third_party/d3/src/d3.js

   1 !function() {
   2   var d3 = {
   3     version: "3.4.4"
   4   };
   5   if (!Date.now) Date.now = function() {
   6     return +new Date();
   7   };
   8   var d3_arraySlice = [].slice, d3_array = function(list) {
   9     return d3_arraySlice.call(list);
  10   };
  11   var d3_document = document, d3_documentElement = d3_document.documentElement, d3_window = window;
  12   try {
  13     d3_array(d3_documentElement.childNodes)[0].nodeType;
  14   } catch (e) {
  15     d3_array = function(list) {
  16       var i = list.length, array = new Array(i);
  17       while (i--) array[i] = list[i];
  18       return array;
  19     };
  20   }
  21   try {
  22     d3_document.createElement("div").style.setProperty("opacity", 0, "");
  23   } catch (error) {
  24     var d3_element_prototype = d3_window.Element.prototype, d3_element_setAttribute = d3_element_prototype.setAttribute, d3_element_setAttributeNS = d3_element_prototype.setAttributeNS, d3_style_prototype = d3_window.CSSStyleDeclaration.prototype, d3_style_setProperty = d3_style_prototype.setProperty;
  25     d3_element_prototype.setAttribute = function(name, value) {
  26       d3_element_setAttribute.call(this, name, value + "");
  27     };
  28     d3_element_prototype.setAttributeNS = function(space, local, value) {
  29       d3_element_setAttributeNS.call(this, space, local, value + "");
  30     };
  31     d3_style_prototype.setProperty = function(name, value, priority) {
  32       d3_style_setProperty.call(this, name, value + "", priority);
  33     };
  34   }
  35   d3.ascending = d3_ascending;
  36   function d3_ascending(a, b) {
  37     return a < b ? -1 : a > b ? 1 : a >= b ? 0 : NaN;
  38   }
  39   d3.descending = function(a, b) {
  40     return b < a ? -1 : b > a ? 1 : b >= a ? 0 : NaN;
  41   };
  42   d3.min = function(array, f) {
  43     var i = -1, n = array.length, a, b;
  44     if (arguments.length === 1) {
  45       while (++i < n && !((a = array[i]) != null && a <= a)) a = undefined;
  46       while (++i < n) if ((b = array[i]) != null && a > b) a = b;
  47     } else {
  48       while (++i < n && !((a = f.call(array, array[i], i)) != null && a <= a)) a = undefined;
  49       while (++i < n) if ((b = f.call(array, array[i], i)) != null && a > b) a = b;
  50     }
  51     return a;
  52   };
  53   d3.max = function(array, f) {
  54     var i = -1, n = array.length, a, b;
  55     if (arguments.length === 1) {
  56       while (++i < n && !((a = array[i]) != null && a <= a)) a = undefined;
  57       while (++i < n) if ((b = array[i]) != null && b > a) a = b;
  58     } else {
  59       while (++i < n && !((a = f.call(array, array[i], i)) != null && a <= a)) a = undefined;
  60       while (++i < n) if ((b = f.call(array, array[i], i)) != null && b > a) a = b;
  61     }
  62     return a;
  63   };
  64   d3.extent = function(array, f) {
  65     var i = -1, n = array.length, a, b, c;
  66     if (arguments.length === 1) {
  67       while (++i < n && !((a = c = array[i]) != null && a <= a)) a = c = undefined;
  68       while (++i < n) if ((b = array[i]) != null) {
  69         if (a > b) a = b;
  70         if (c < b) c = b;
  71       }
  72     } else {
  73       while (++i < n && !((a = c = f.call(array, array[i], i)) != null && a <= a)) a = undefined;
  74       while (++i < n) if ((b = f.call(array, array[i], i)) != null) {
  75         if (a > b) a = b;
  76         if (c < b) c = b;
  77       }
  78     }
  79     return [ a, c ];
  80   };
  81   d3.sum = function(array, f) {
  82     var s = 0, n = array.length, a, i = -1;
  83     if (arguments.length === 1) {
  84       while (++i < n) if (!isNaN(a = +array[i])) s += a;
  85     } else {
  86       while (++i < n) if (!isNaN(a = +f.call(array, array[i], i))) s += a;
  87     }
  88     return s;
  89   };
  90   function d3_number(x) {
  91     return x != null && !isNaN(x);
  92   }
  93   d3.mean = function(array, f) {
  94     var n = array.length, a, m = 0, i = -1, j = 0;
  95     if (arguments.length === 1) {
  96       while (++i < n) if (d3_number(a = array[i])) m += (a - m) / ++j;
  97     } else {
  98       while (++i < n) if (d3_number(a = f.call(array, array[i], i))) m += (a - m) / ++j;
  99     }
 100     return j ? m : undefined;
 101   };
 102   d3.quantile = function(values, p) {
 103     var H = (values.length - 1) * p + 1, h = Math.floor(H), v = +values[h - 1], e = H - h;
 104     return e ? v + e * (values[h] - v) : v;
 105   };
 106   d3.median = function(array, f) {
 107     if (arguments.length > 1) array = array.map(f);
 108     array = array.filter(d3_number);
 109     return array.length ? d3.quantile(array.sort(d3_ascending), .5) : undefined;
 110   };
 111   function d3_bisector(compare) {
 112     return {
 113       left: function(a, x, lo, hi) {
 114         if (arguments.length < 3) lo = 0;
 115         if (arguments.length < 4) hi = a.length;
 116         while (lo < hi) {
 117           var mid = lo + hi >>> 1;
 118           if (compare(a[mid], x) < 0) lo = mid + 1; else hi = mid;
 119         }
 120         return lo;
 121       },
 122       right: function(a, x, lo, hi) {
 123         if (arguments.length < 3) lo = 0;
 124         if (arguments.length < 4) hi = a.length;
 125         while (lo < hi) {
 126           var mid = lo + hi >>> 1;
 127           if (compare(a[mid], x) > 0) hi = mid; else lo = mid + 1;
 128         }
 129         return lo;
 130       }
 131     };
 132   }
 133   var d3_bisect = d3_bisector(d3_ascending);
 134   d3.bisectLeft = d3_bisect.left;
 135   d3.bisect = d3.bisectRight = d3_bisect.right;
 136   d3.bisector = function(f) {
 137     return d3_bisector(f.length === 1 ? function(d, x) {
 138       return d3_ascending(f(d), x);
 139     } : f);
 140   };
 141   d3.shuffle = function(array) {
 142     var m = array.length, t, i;
 143     while (m) {
 144       i = Math.random() * m-- | 0;
 145       t = array[m], array[m] = array[i], array[i] = t;
 146     }
 147     return array;
 148   };
 149   d3.permute = function(array, indexes) {
 150     var i = indexes.length, permutes = new Array(i);
 151     while (i--) permutes[i] = array[indexes[i]];
 152     return permutes;
 153   };
 154   d3.pairs = function(array) {
 155     var i = 0, n = array.length - 1, p0, p1 = array[0], pairs = new Array(n < 0 ? 0 : n);
 156     while (i < n) pairs[i] = [ p0 = p1, p1 = array[++i] ];
 157     return pairs;
 158   };
 159   d3.zip = function() {
 160     if (!(n = arguments.length)) return [];
 161     for (var i = -1, m = d3.min(arguments, d3_zipLength), zips = new Array(m); ++i < m; ) {
 162       for (var j = -1, n, zip = zips[i] = new Array(n); ++j < n; ) {
 163         zip[j] = arguments[j][i];
 164       }
 165     }
 166     return zips;
 167   };
 168   function d3_zipLength(d) {
 169     return d.length;
 170   }
 171   d3.transpose = function(matrix) {
 172     return d3.zip.apply(d3, matrix);
 173   };
 174   d3.keys = function(map) {
 175     var keys = [];
 176     for (var key in map) keys.push(key);
 177     return keys;
 178   };
 179   d3.values = function(map) {
 180     var values = [];
 181     for (var key in map) values.push(map[key]);
 182     return values;
 183   };
 184   d3.entries = function(map) {
 185     var entries = [];
 186     for (var key in map) entries.push({
 187       key: key,
 188       value: map[key]
 189     });
 190     return entries;
 191   };
 192   d3.merge = function(arrays) {
 193     var n = arrays.length, m, i = -1, j = 0, merged, array;
 194     while (++i < n) j += arrays[i].length;
 195     merged = new Array(j);
 196     while (--n >= 0) {
 197       array = arrays[n];
 198       m = array.length;
 199       while (--m >= 0) {
 200         merged[--j] = array[m];
 201       }
 202     }
 203     return merged;
 204   };
 205   var abs = Math.abs;
 206   d3.range = function(start, stop, step) {
 207     if (arguments.length < 3) {
 208       step = 1;
 209       if (arguments.length < 2) {
 210         stop = start;
 211         start = 0;
 212       }
 213     }
 214     if ((stop - start) / step === Infinity) throw new Error("infinite range");
 215     var range = [], k = d3_range_integerScale(abs(step)), i = -1, j;
 216     start *= k, stop *= k, step *= k;
 217     if (step < 0) while ((j = start + step * ++i) > stop) range.push(j / k); else while ((j = start + step * ++i) < stop) range.push(j / k);
 218     return range;
 219   };
 220   function d3_range_integerScale(x) {
 221     var k = 1;
 222     while (x * k % 1) k *= 10;
 223     return k;
 224   }
 225   function d3_class(ctor, properties) {
 226     try {
 227       for (var key in properties) {
 228         Object.defineProperty(ctor.prototype, key, {
 229           value: properties[key],
 230           enumerable: false
 231         });
 232       }
 233     } catch (e) {
 234       ctor.prototype = properties;
 235     }
 236   }
 237   d3.map = function(object) {
 238     var map = new d3_Map();
 239     if (object instanceof d3_Map) object.forEach(function(key, value) {
 240       map.set(key, value);
 241     }); else for (var key in object) map.set(key, object[key]);
 242     return map;
 243   };
 244   function d3_Map() {}
 245   d3_class(d3_Map, {
 246     has: d3_map_has,
 247     get: function(key) {
 248       return this[d3_map_prefix + key];
 249     },
 250     set: function(key, value) {
 251       return this[d3_map_prefix + key] = value;
 252     },
 253     remove: d3_map_remove,
 254     keys: d3_map_keys,
 255     values: function() {
 256       var values = [];
 257       this.forEach(function(key, value) {
 258         values.push(value);
 259       });
 260       return values;
 261     },
 262     entries: function() {
 263       var entries = [];
 264       this.forEach(function(key, value) {
 265         entries.push({
 266           key: key,
 267           value: value
 268         });
 269       });
 270       return entries;
 271     },
 272     size: d3_map_size,
 273     empty: d3_map_empty,
 274     forEach: function(f) {
 275       for (var key in this) if (key.charCodeAt(0) === d3_map_prefixCode) f.call(this, key.substring(1), this[key]);
 276     }
 277   });
 278   var d3_map_prefix = "\x00", d3_map_prefixCode = d3_map_prefix.charCodeAt(0);
 279   function d3_map_has(key) {
 280     return d3_map_prefix + key in this;
 281   }
 282   function d3_map_remove(key) {
 283     key = d3_map_prefix + key;
 284     return key in this && delete this[key];
 285   }
 286   function d3_map_keys() {
 287     var keys = [];
 288     this.forEach(function(key) {
 289       keys.push(key);
 290     });
 291     return keys;
 292   }
 293   function d3_map_size() {
 294     var size = 0;
 295     for (var key in this) if (key.charCodeAt(0) === d3_map_prefixCode) ++size;
 296     return size;
 297   }
 298   function d3_map_empty() {
 299     for (var key in this) if (key.charCodeAt(0) === d3_map_prefixCode) return false;
 300     return true;
 301   }
 302   d3.nest = function() {
 303     var nest = {}, keys = [], sortKeys = [], sortValues, rollup;
 304     function map(mapType, array, depth) {
 305       if (depth >= keys.length) return rollup ? rollup.call(nest, array) : sortValues ? array.sort(sortValues) : array;
 306       var i = -1, n = array.length, key = keys[depth++], keyValue, object, setter, valuesByKey = new d3_Map(), values;
 307       while (++i < n) {
 308         if (values = valuesByKey.get(keyValue = key(object = array[i]))) {
 309           values.push(object);
 310         } else {
 311           valuesByKey.set(keyValue, [ object ]);
 312         }
 313       }
 314       if (mapType) {
 315         object = mapType();
 316         setter = function(keyValue, values) {
 317           object.set(keyValue, map(mapType, values, depth));
 318         };
 319       } else {
 320         object = {};
 321         setter = function(keyValue, values) {
 322           object[keyValue] = map(mapType, values, depth);
 323         };
 324       }
 325       valuesByKey.forEach(setter);
 326       return object;
 327     }
 328     function entries(map, depth) {
 329       if (depth >= keys.length) return map;
 330       var array = [], sortKey = sortKeys[depth++];
 331       map.forEach(function(key, keyMap) {
 332         array.push({
 333           key: key,
 334           values: entries(keyMap, depth)
 335         });
 336       });
 337       return sortKey ? array.sort(function(a, b) {
 338         return sortKey(a.key, b.key);
 339       }) : array;
 340     }
 341     nest.map = function(array, mapType) {
 342       return map(mapType, array, 0);
 343     };
 344     nest.entries = function(array) {
 345       return entries(map(d3.map, array, 0), 0);
 346     };
 347     nest.key = function(d) {
 348       keys.push(d);
 349       return nest;
 350     };
 351     nest.sortKeys = function(order) {
 352       sortKeys[keys.length - 1] = order;
 353       return nest;
 354     };
 355     nest.sortValues = function(order) {
 356       sortValues = order;
 357       return nest;
 358     };
 359     nest.rollup = function(f) {
 360       rollup = f;
 361       return nest;
 362     };
 363     return nest;
 364   };
 365   d3.set = function(array) {
 366     var set = new d3_Set();
 367     if (array) for (var i = 0, n = array.length; i < n; ++i) set.add(array[i]);
 368     return set;
 369   };
 370   function d3_Set() {}
 371   d3_class(d3_Set, {
 372     has: d3_map_has,
 373     add: function(value) {
 374       this[d3_map_prefix + value] = true;
 375       return value;
 376     },
 377     remove: function(value) {
 378       value = d3_map_prefix + value;
 379       return value in this && delete this[value];
 380     },
 381     values: d3_map_keys,
 382     size: d3_map_size,
 383     empty: d3_map_empty,
 384     forEach: function(f) {
 385       for (var value in this) if (value.charCodeAt(0) === d3_map_prefixCode) f.call(this, value.substring(1));
 386     }
 387   });
 388   d3.behavior = {};
 389   d3.rebind = function(target, source) {
 390     var i = 1, n = arguments.length, method;
 391     while (++i < n) target[method = arguments[i]] = d3_rebind(target, source, source[method]);
 392     return target;
 393   };
 394   function d3_rebind(target, source, method) {
 395     return function() {
 396       var value = method.apply(source, arguments);
 397       return value === source ? target : value;
 398     };
 399   }
 400   function d3_vendorSymbol(object, name) {
 401     if (name in object) return name;
 402     name = name.charAt(0).toUpperCase() + name.substring(1);
 403     for (var i = 0, n = d3_vendorPrefixes.length; i < n; ++i) {
 404       var prefixName = d3_vendorPrefixes[i] + name;
 405       if (prefixName in object) return prefixName;
 406     }
 407   }
 408   var d3_vendorPrefixes = [ "webkit", "ms", "moz", "Moz", "o", "O" ];
 409   function d3_noop() {}
 410   d3.dispatch = function() {
 411     var dispatch = new d3_dispatch(), i = -1, n = arguments.length;
 412     while (++i < n) dispatch[arguments[i]] = d3_dispatch_event(dispatch);
 413     return dispatch;
 414   };
 415   function d3_dispatch() {}
 416   d3_dispatch.prototype.on = function(type, listener) {
 417     var i = type.indexOf("."), name = "";
 418     if (i >= 0) {
 419       name = type.substring(i + 1);
 420       type = type.substring(0, i);
 421     }
 422     if (type) return arguments.length < 2 ? this[type].on(name) : this[type].on(name, listener);
 423     if (arguments.length === 2) {
 424       if (listener == null) for (type in this) {
 425         if (this.hasOwnProperty(type)) this[type].on(name, null);
 426       }
 427       return this;
 428     }
 429   };
 430   function d3_dispatch_event(dispatch) {
 431     var listeners = [], listenerByName = new d3_Map();
 432     function event() {
 433       var z = listeners, i = -1, n = z.length, l;
 434       while (++i < n) if (l = z[i].on) l.apply(this, arguments);
 435       return dispatch;
 436     }
 437     event.on = function(name, listener) {
 438       var l = listenerByName.get(name), i;
 439       if (arguments.length < 2) return l && l.on;
 440       if (l) {
 441         l.on = null;
 442         listeners = listeners.slice(0, i = listeners.indexOf(l)).concat(listeners.slice(i + 1));
 443         listenerByName.remove(name);
 444       }
 445       if (listener) listeners.push(listenerByName.set(name, {
 446         on: listener
 447       }));
 448       return dispatch;
 449     };
 450     return event;
 451   }
 452   d3.event = null;
 453   function d3_eventPreventDefault() {
 454     d3.event.preventDefault();
 455   }
 456   function d3_eventSource() {
 457     var e = d3.event, s;
 458     while (s = e.sourceEvent) e = s;
 459     return e;
 460   }
 461   function d3_eventDispatch(target) {
 462     var dispatch = new d3_dispatch(), i = 0, n = arguments.length;
 463     while (++i < n) dispatch[arguments[i]] = d3_dispatch_event(dispatch);
 464     dispatch.of = function(thiz, argumentz) {
 465       return function(e1) {
 466         try {
 467           var e0 = e1.sourceEvent = d3.event;
 468           e1.target = target;
 469           d3.event = e1;
 470           dispatch[e1.type].apply(thiz, argumentz);
 471         } finally {
 472           d3.event = e0;
 473         }
 474       };
 475     };
 476     return dispatch;
 477   }
 478   d3.requote = function(s) {
 479     return s.replace(d3_requote_re, "\\$&");
 480   };
 481   var d3_requote_re = /[\\\^\$\*\+\?\|\[\]\(\)\.\{\}]/g;
 482   var d3_subclass = {}.__proto__ ? function(object, prototype) {
 483     object.__proto__ = prototype;
 484   } : function(object, prototype) {
 485     for (var property in prototype) object[property] = prototype[property];
 486   };
 487   function d3_selection(groups) {
 488     d3_subclass(groups, d3_selectionPrototype);
 489     return groups;
 490   }
 491   var d3_select = function(s, n) {
 492     return n.querySelector(s);
 493   }, d3_selectAll = function(s, n) {
 494     return n.querySelectorAll(s);
 495   }, d3_selectMatcher = d3_documentElement[d3_vendorSymbol(d3_documentElement, "matchesSelector")], d3_selectMatches = function(n, s) {
 496     return d3_selectMatcher.call(n, s);
 497   };
 498   if (typeof Sizzle === "function") {
 499     d3_select = function(s, n) {
 500       return Sizzle(s, n)[0] || null;
 501     };
 502     d3_selectAll = Sizzle;
 503     d3_selectMatches = Sizzle.matchesSelector;
 504   }
 505   d3.selection = function() {
 506     return d3_selectionRoot;
 507   };
 508   var d3_selectionPrototype = d3.selection.prototype = [];
 509   d3_selectionPrototype.select = function(selector) {
 510     var subgroups = [], subgroup, subnode, group, node;
 511     selector = d3_selection_selector(selector);
 512     for (var j = -1, m = this.length; ++j < m; ) {
 513       subgroups.push(subgroup = []);
 514       subgroup.parentNode = (group = this[j]).parentNode;
 515       for (var i = -1, n = group.length; ++i < n; ) {
 516         if (node = group[i]) {
 517           subgroup.push(subnode = selector.call(node, node.__data__, i, j));
 518           if (subnode && "__data__" in node) subnode.__data__ = node.__data__;
 519         } else {
 520           subgroup.push(null);
 521         }
 522       }
 523     }
 524     return d3_selection(subgroups);
 525   };
 526   function d3_selection_selector(selector) {
 527     return typeof selector === "function" ? selector : function() {
 528       return d3_select(selector, this);
 529     };
 530   }
 531   d3_selectionPrototype.selectAll = function(selector) {
 532     var subgroups = [], subgroup, node;
 533     selector = d3_selection_selectorAll(selector);
 534     for (var j = -1, m = this.length; ++j < m; ) {
 535       for (var group = this[j], i = -1, n = group.length; ++i < n; ) {
 536         if (node = group[i]) {
 537           subgroups.push(subgroup = d3_array(selector.call(node, node.__data__, i, j)));
 538           subgroup.parentNode = node;
 539         }
 540       }
 541     }
 542     return d3_selection(subgroups);
 543   };
 544   function d3_selection_selectorAll(selector) {
 545     return typeof selector === "function" ? selector : function() {
 546       return d3_selectAll(selector, this);
 547     };
 548   }
 549   var d3_nsPrefix = {
 550     svg: "http://www.w3.org/2000/svg",
 551     xhtml: "http://www.w3.org/1999/xhtml",
 552     xlink: "http://www.w3.org/1999/xlink",
 553     xml: "http://www.w3.org/XML/1998/namespace",
 554     xmlns: "http://www.w3.org/2000/xmlns/"
 555   };
 556   d3.ns = {
 557     prefix: d3_nsPrefix,
 558     qualify: function(name) {
 559       var i = name.indexOf(":"), prefix = name;
 560       if (i >= 0) {
 561         prefix = name.substring(0, i);
 562         name = name.substring(i + 1);
 563       }
 564       return d3_nsPrefix.hasOwnProperty(prefix) ? {
 565         space: d3_nsPrefix[prefix],
 566         local: name
 567       } : name;
 568     }
 569   };
 570   d3_selectionPrototype.attr = function(name, value) {
 571     if (arguments.length < 2) {
 572       if (typeof name === "string") {
 573         var node = this.node();
 574         name = d3.ns.qualify(name);
 575         return name.local ? node.getAttributeNS(name.space, name.local) : node.getAttribute(name);
 576       }
 577       for (value in name) this.each(d3_selection_attr(value, name[value]));
 578       return this;
 579     }
 580     return this.each(d3_selection_attr(name, value));
 581   };
 582   function d3_selection_attr(name, value) {
 583     name = d3.ns.qualify(name);
 584     function attrNull() {
 585       this.removeAttribute(name);
 586     }
 587     function attrNullNS() {
 588       this.removeAttributeNS(name.space, name.local);
 589     }
 590     function attrConstant() {
 591       this.setAttribute(name, value);
 592     }
 593     function attrConstantNS() {
 594       this.setAttributeNS(name.space, name.local, value);
 595     }
 596     function attrFunction() {
 597       var x = value.apply(this, arguments);
 598       if (x == null) this.removeAttribute(name); else this.setAttribute(name, x);
 599     }
 600     function attrFunctionNS() {
 601       var x = value.apply(this, arguments);
 602       if (x == null) this.removeAttributeNS(name.space, name.local); else this.setAttributeNS(name.space, name.local, x);
 603     }
 604     return value == null ? name.local ? attrNullNS : attrNull : typeof value === "function" ? name.local ? attrFunctionNS : attrFunction : name.local ? attrConstantNS : attrConstant;
 605   }
 606   function d3_collapse(s) {
 607     return s.trim().replace(/\s+/g, " ");
 608   }
 609   d3_selectionPrototype.classed = function(name, value) {
 610     if (arguments.length < 2) {
 611       if (typeof name === "string") {
 612         var node = this.node(), n = (name = d3_selection_classes(name)).length, i = -1;
 613         if (value = node.classList) {
 614           while (++i < n) if (!value.contains(name[i])) return false;
 615         } else {
 616           value = node.getAttribute("class");
 617           while (++i < n) if (!d3_selection_classedRe(name[i]).test(value)) return false;
 618         }
 619         return true;
 620       }
 621       for (value in name) this.each(d3_selection_classed(value, name[value]));
 622       return this;
 623     }
 624     return this.each(d3_selection_classed(name, value));
 625   };
 626   function d3_selection_classedRe(name) {
 627     return new RegExp("(?:^|\\s+)" + d3.requote(name) + "(?:\\s+|$)", "g");
 628   }
 629   function d3_selection_classes(name) {
 630     return name.trim().split(/^|\s+/);
 631   }
 632   function d3_selection_classed(name, value) {
 633     name = d3_selection_classes(name).map(d3_selection_classedName);
 634     var n = name.length;
 635     function classedConstant() {
 636       var i = -1;
 637       while (++i < n) name[i](this, value);
 638     }
 639     function classedFunction() {
 640       var i = -1, x = value.apply(this, arguments);
 641       while (++i < n) name[i](this, x);
 642     }
 643     return typeof value === "function" ? classedFunction : classedConstant;
 644   }
 645   function d3_selection_classedName(name) {
 646     var re = d3_selection_classedRe(name);
 647     return function(node, value) {
 648       if (c = node.classList) return value ? c.add(name) : c.remove(name);
 649       var c = node.getAttribute("class") || "";
 650       if (value) {
 651         re.lastIndex = 0;
 652         if (!re.test(c)) node.setAttribute("class", d3_collapse(c + " " + name));
 653       } else {
 654         node.setAttribute("class", d3_collapse(c.replace(re, " ")));
 655       }
 656     };
 657   }
 658   d3_selectionPrototype.style = function(name, value, priority) {
 659     var n = arguments.length;
 660     if (n < 3) {
 661       if (typeof name !== "string") {
 662         if (n < 2) value = "";
 663         for (priority in name) this.each(d3_selection_style(priority, name[priority], value));
 664         return this;
 665       }
 666       if (n < 2) return d3_window.getComputedStyle(this.node(), null).getPropertyValue(name);
 667       priority = "";
 668     }
 669     return this.each(d3_selection_style(name, value, priority));
 670   };
 671   function d3_selection_style(name, value, priority) {
 672     function styleNull() {
 673       this.style.removeProperty(name);
 674     }
 675     function styleConstant() {
 676       this.style.setProperty(name, value, priority);
 677     }
 678     function styleFunction() {
 679       var x = value.apply(this, arguments);
 680       if (x == null) this.style.removeProperty(name); else this.style.setProperty(name, x, priority);
 681     }
 682     return value == null ? styleNull : typeof value === "function" ? styleFunction : styleConstant;
 683   }
 684   d3_selectionPrototype.property = function(name, value) {
 685     if (arguments.length < 2) {
 686       if (typeof name === "string") return this.node()[name];
 687       for (value in name) this.each(d3_selection_property(value, name[value]));
 688       return this;
 689     }
 690     return this.each(d3_selection_property(name, value));
 691   };
 692   function d3_selection_property(name, value) {
 693     function propertyNull() {
 694       delete this[name];
 695     }
 696     function propertyConstant() {
 697       this[name] = value;
 698     }
 699     function propertyFunction() {
 700       var x = value.apply(this, arguments);
 701       if (x == null) delete this[name]; else this[name] = x;
 702     }
 703     return value == null ? propertyNull : typeof value === "function" ? propertyFunction : propertyConstant;
 704   }
 705   d3_selectionPrototype.text = function(value) {
 706     return arguments.length ? this.each(typeof value === "function" ? function() {
 707       var v = value.apply(this, arguments);
 708       this.textContent = v == null ? "" : v;
 709     } : value == null ? function() {
 710       this.textContent = "";
 711     } : function() {
 712       this.textContent = value;
 713     }) : this.node().textContent;
 714   };
 715   d3_selectionPrototype.html = function(value) {
 716     throw "disallowed by chromium security";
 717     return arguments.length ? this.each(typeof value === "function" ? function() {
 718       var v = value.apply(this, arguments);
 719       this.innerHTML = v == null ? "" : v;
 720     } : value == null ? function() {
 721       this.innerHTML = "";
 722     } : function() {
 723       this.innerHTML = value;
 724     }) : this.node().innerHTML;
 725   };
 726   d3_selectionPrototype.append = function(name) {
 727     name = d3_selection_creator(name);
 728     return this.select(function() {
 729       return this.appendChild(name.apply(this, arguments));
 730     });
 731   };
 732   function d3_selection_creator(name) {
 733     return typeof name === "function" ? name : (name = d3.ns.qualify(name)).local ? function() {
 734       return this.ownerDocument.createElementNS(name.space, name.local);
 735     } : function() {
 736       return this.ownerDocument.createElementNS(this.namespaceURI, name);
 737     };
 738   }
 739   d3_selectionPrototype.insert = function(name, before) {
 740     name = d3_selection_creator(name);
 741     before = d3_selection_selector(before);
 742     return this.select(function() {
 743       return this.insertBefore(name.apply(this, arguments), before.apply(this, arguments) || null);
 744     });
 745   };
 746   d3_selectionPrototype.remove = function() {
 747     return this.each(function() {
 748       var parent = this.parentNode;
 749       if (parent) parent.removeChild(this);
 750     });
 751   };
 752   d3_selectionPrototype.data = function(value, key) {
 753     var i = -1, n = this.length, group, node;
 754     if (!arguments.length) {
 755       value = new Array(n = (group = this[0]).length);
 756       while (++i < n) {
 757         if (node = group[i]) {
 758           value[i] = node.__data__;
 759         }
 760       }
 761       return value;
 762     }
 763     function bind(group, groupData) {
 764       var i, n = group.length, m = groupData.length, n0 = Math.min(n, m), updateNodes = new Array(m), enterNodes = new Array(m), exitNodes = new Array(n), node, nodeData;
 765       if (key) {
 766         var nodeByKeyValue = new d3_Map(), dataByKeyValue = new d3_Map(), keyValues = [], keyValue;
 767         for (i = -1; ++i < n; ) {
 768           keyValue = key.call(node = group[i], node.__data__, i);
 769           if (nodeByKeyValue.has(keyValue)) {
 770             exitNodes[i] = node;
 771           } else {
 772             nodeByKeyValue.set(keyValue, node);
 773           }
 774           keyValues.push(keyValue);
 775         }
 776         for (i = -1; ++i < m; ) {
 777           keyValue = key.call(groupData, nodeData = groupData[i], i);
 778           if (node = nodeByKeyValue.get(keyValue)) {
 779             updateNodes[i] = node;
 780             node.__data__ = nodeData;
 781           } else if (!dataByKeyValue.has(keyValue)) {
 782             enterNodes[i] = d3_selection_dataNode(nodeData);
 783           }
 784           dataByKeyValue.set(keyValue, nodeData);
 785           nodeByKeyValue.remove(keyValue);
 786         }
 787         for (i = -1; ++i < n; ) {
 788           if (nodeByKeyValue.has(keyValues[i])) {
 789             exitNodes[i] = group[i];
 790           }
 791         }
 792       } else {
 793         for (i = -1; ++i < n0; ) {
 794           node = group[i];
 795           nodeData = groupData[i];
 796           if (node) {
 797             node.__data__ = nodeData;
 798             updateNodes[i] = node;
 799           } else {
 800             enterNodes[i] = d3_selection_dataNode(nodeData);
 801           }
 802         }
 803         for (;i < m; ++i) {
 804           enterNodes[i] = d3_selection_dataNode(groupData[i]);
 805         }
 806         for (;i < n; ++i) {
 807           exitNodes[i] = group[i];
 808         }
 809       }
 810       enterNodes.update = updateNodes;
 811       enterNodes.parentNode = updateNodes.parentNode = exitNodes.parentNode = group.parentNode;
 812       enter.push(enterNodes);
 813       update.push(updateNodes);
 814       exit.push(exitNodes);
 815     }
 816     var enter = d3_selection_enter([]), update = d3_selection([]), exit = d3_selection([]);
 817     if (typeof value === "function") {
 818       while (++i < n) {
 819         bind(group = this[i], value.call(group, group.parentNode.__data__, i));
 820       }
 821     } else {
 822       while (++i < n) {
 823         bind(group = this[i], value);
 824       }
 825     }
 826     update.enter = function() {
 827       return enter;
 828     };
 829     update.exit = function() {
 830       return exit;
 831     };
 832     return update;
 833   };
 834   function d3_selection_dataNode(data) {
 835     return {
 836       __data__: data
 837     };
 838   }
 839   d3_selectionPrototype.datum = function(value) {
 840     return arguments.length ? this.property("__data__", value) : this.property("__data__");
 841   };
 842   d3_selectionPrototype.filter = function(filter) {
 843     var subgroups = [], subgroup, group, node;
 844     if (typeof filter !== "function") filter = d3_selection_filter(filter);
 845     for (var j = 0, m = this.length; j < m; j++) {
 846       subgroups.push(subgroup = []);
 847       subgroup.parentNode = (group = this[j]).parentNode;
 848       for (var i = 0, n = group.length; i < n; i++) {
 849         if ((node = group[i]) && filter.call(node, node.__data__, i, j)) {
 850           subgroup.push(node);
 851         }
 852       }
 853     }
 854     return d3_selection(subgroups);
 855   };
 856   function d3_selection_filter(selector) {
 857     return function() {
 858       return d3_selectMatches(this, selector);
 859     };
 860   }
 861   d3_selectionPrototype.order = function() {
 862     for (var j = -1, m = this.length; ++j < m; ) {
 863       for (var group = this[j], i = group.length - 1, next = group[i], node; --i >= 0; ) {
 864         if (node = group[i]) {
 865           if (next && next !== node.nextSibling) next.parentNode.insertBefore(node, next);
 866           next = node;
 867         }
 868       }
 869     }
 870     return this;
 871   };
 872   d3_selectionPrototype.sort = function(comparator) {
 873     comparator = d3_selection_sortComparator.apply(this, arguments);
 874     for (var j = -1, m = this.length; ++j < m; ) this[j].sort(comparator);
 875     return this.order();
 876   };
 877   function d3_selection_sortComparator(comparator) {
 878     if (!arguments.length) comparator = d3_ascending;
 879     return function(a, b) {
 880       return a && b ? comparator(a.__data__, b.__data__) : !a - !b;
 881     };
 882   }
 883   d3_selectionPrototype.each = function(callback) {
 884     return d3_selection_each(this, function(node, i, j) {
 885       callback.call(node, node.__data__, i, j);
 886     });
 887   };
 888   function d3_selection_each(groups, callback) {
 889     for (var j = 0, m = groups.length; j < m; j++) {
 890       for (var group = groups[j], i = 0, n = group.length, node; i < n; i++) {
 891         if (node = group[i]) callback(node, i, j);
 892       }
 893     }
 894     return groups;
 895   }
 896   d3_selectionPrototype.call = function(callback) {
 897     var args = d3_array(arguments);
 898     callback.apply(args[0] = this, args);
 899     return this;
 900   };
 901   d3_selectionPrototype.empty = function() {
 902     return !this.node();
 903   };
 904   d3_selectionPrototype.node = function() {
 905     for (var j = 0, m = this.length; j < m; j++) {
 906       for (var group = this[j], i = 0, n = group.length; i < n; i++) {
 907         var node = group[i];
 908         if (node) return node;
 909       }
 910     }
 911     return null;
 912   };
 913   d3_selectionPrototype.size = function() {
 914     var n = 0;
 915     this.each(function() {
 916       ++n;
 917     });
 918     return n;
 919   };
 920   function d3_selection_enter(selection) {
 921     d3_subclass(selection, d3_selection_enterPrototype);
 922     return selection;
 923   }
 924   var d3_selection_enterPrototype = [];
 925   d3.selection.enter = d3_selection_enter;
 926   d3.selection.enter.prototype = d3_selection_enterPrototype;
 927   d3_selection_enterPrototype.append = d3_selectionPrototype.append;
 928   d3_selection_enterPrototype.empty = d3_selectionPrototype.empty;
 929   d3_selection_enterPrototype.node = d3_selectionPrototype.node;
 930   d3_selection_enterPrototype.call = d3_selectionPrototype.call;
 931   d3_selection_enterPrototype.size = d3_selectionPrototype.size;
 932   d3_selection_enterPrototype.select = function(selector) {
 933     var subgroups = [], subgroup, subnode, upgroup, group, node;
 934     for (var j = -1, m = this.length; ++j < m; ) {
 935       upgroup = (group = this[j]).update;
 936       subgroups.push(subgroup = []);
 937       subgroup.parentNode = group.parentNode;
 938       for (var i = -1, n = group.length; ++i < n; ) {
 939         if (node = group[i]) {
 940           subgroup.push(upgroup[i] = subnode = selector.call(group.parentNode, node.__data__, i, j));
 941           subnode.__data__ = node.__data__;
 942         } else {
 943           subgroup.push(null);
 944         }
 945       }
 946     }
 947     return d3_selection(subgroups);
 948   };
 949   d3_selection_enterPrototype.insert = function(name, before) {
 950     if (arguments.length < 2) before = d3_selection_enterInsertBefore(this);
 951     return d3_selectionPrototype.insert.call(this, name, before);
 952   };
 953   function d3_selection_enterInsertBefore(enter) {
 954     var i0, j0;
 955     return function(d, i, j) {
 956       var group = enter[j].update, n = group.length, node;
 957       if (j != j0) j0 = j, i0 = 0;
 958       if (i >= i0) i0 = i + 1;
 959       while (!(node = group[i0]) && ++i0 < n) ;
 960       return node;
 961     };
 962   }
 963   d3_selectionPrototype.transition = function() {
 964     var id = d3_transitionInheritId || ++d3_transitionId, subgroups = [], subgroup, node, transition = d3_transitionInherit || {
 965       time: Date.now(),
 966       ease: d3_ease_cubicInOut,
 967       delay: 0,
 968       duration: 250
 969     };
 970     for (var j = -1, m = this.length; ++j < m; ) {
 971       subgroups.push(subgroup = []);
 972       for (var group = this[j], i = -1, n = group.length; ++i < n; ) {
 973         if (node = group[i]) d3_transitionNode(node, i, id, transition);
 974         subgroup.push(node);
 975       }
 976     }
 977     return d3_transition(subgroups, id);
 978   };
 979   d3_selectionPrototype.interrupt = function() {
 980     return this.each(d3_selection_interrupt);
 981   };
 982   function d3_selection_interrupt() {
 983     var lock = this.__transition__;
 984     if (lock) ++lock.active;
 985   }
 986   d3.select = function(node) {
 987     var group = [ typeof node === "string" ? d3_select(node, d3_document) : node ];
 988     group.parentNode = d3_documentElement;
 989     return d3_selection([ group ]);
 990   };
 991   d3.selectAll = function(nodes) {
 992     var group = d3_array(typeof nodes === "string" ? d3_selectAll(nodes, d3_document) : nodes);
 993     group.parentNode = d3_documentElement;
 994     return d3_selection([ group ]);
 995   };
 996   var d3_selectionRoot = d3.select(d3_documentElement);
 997   d3_selectionPrototype.on = function(type, listener, capture) {
 998     var n = arguments.length;
 999     if (n < 3) {
1000       if (typeof type !== "string") {
1001         if (n < 2) listener = false;
1002         for (capture in type) this.each(d3_selection_on(capture, type[capture], listener));
1003         return this;
1004       }
1005       if (n < 2) return (n = this.node()["__on" + type]) && n._;
1006       capture = false;
1007     }
1008     return this.each(d3_selection_on(type, listener, capture));
1009   };
1010   function d3_selection_on(type, listener, capture) {
1011     var name = "__on" + type, i = type.indexOf("."), wrap = d3_selection_onListener;
1012     if (i > 0) type = type.substring(0, i);
1013     var filter = d3_selection_onFilters.get(type);
1014     if (filter) type = filter, wrap = d3_selection_onFilter;
1015     function onRemove() {
1016       var l = this[name];
1017       if (l) {
1018         this.removeEventListener(type, l, l.$);
1019         delete this[name];
1020       }
1021     }
1022     function onAdd() {
1023       var l = wrap(listener, d3_array(arguments));
1024       onRemove.call(this);
1025       this.addEventListener(type, this[name] = l, l.$ = capture);
1026       l._ = listener;
1027     }
1028     function removeAll() {
1029       var re = new RegExp("^__on([^.]+)" + d3.requote(type) + "$"), match;
1030       for (var name in this) {
1031         if (match = name.match(re)) {
1032           var l = this[name];
1033           this.removeEventListener(match[1], l, l.$);
1034           delete this[name];
1035         }
1036       }
1037     }
1038     return i ? listener ? onAdd : onRemove : listener ? d3_noop : removeAll;
1039   }
1040   var d3_selection_onFilters = d3.map({
1041     mouseenter: "mouseover",
1042     mouseleave: "mouseout"
1043   });
1044   d3_selection_onFilters.forEach(function(k) {
1045     if ("on" + k in d3_document) d3_selection_onFilters.remove(k);
1046   });
1047   function d3_selection_onListener(listener, argumentz) {
1048     return function(e) {
1049       var o = d3.event;
1050       d3.event = e;
1051       argumentz[0] = this.__data__;
1052       try {
1053         listener.apply(this, argumentz);
1054       } finally {
1055         d3.event = o;
1056       }
1057     };
1058   }
1059   function d3_selection_onFilter(listener, argumentz) {
1060     var l = d3_selection_onListener(listener, argumentz);
1061     return function(e) {
1062       var target = this, related = e.relatedTarget;
1063       if (!related || related !== target && !(related.compareDocumentPosition(target) & 8)) {
1064         l.call(target, e);
1065       }
1066     };
1067   }
1068   var d3_event_dragSelect = "onselectstart" in d3_document ? null : d3_vendorSymbol(d3_documentElement.style, "userSelect"), d3_event_dragId = 0;
1069   function d3_event_dragSuppress() {
1070     var name = ".dragsuppress-" + ++d3_event_dragId, click = "click" + name, w = d3.select(d3_window).on("touchmove" + name, d3_eventPreventDefault).on("dragstart" + name, d3_eventPreventDefault).on("selectstart" + name, d3_eventPreventDefault);
1071     if (d3_event_dragSelect) {
1072       var style = d3_documentElement.style, select = style[d3_event_dragSelect];
1073       style[d3_event_dragSelect] = "none";
1074     }
1075     return function(suppressClick) {
1076       w.on(name, null);
1077       if (d3_event_dragSelect) style[d3_event_dragSelect] = select;
1078       if (suppressClick) {
1079         function off() {
1080           w.on(click, null);
1081         }
1082         w.on(click, function() {
1083           d3_eventPreventDefault();
1084           off();
1085         }, true);
1086         setTimeout(off, 0);
1087       }
1088     };
1089   }
1090   d3.mouse = function(container) {
1091     return d3_mousePoint(container, d3_eventSource());
1092   };
1093   function d3_mousePoint(container, e) {
1094     if (e.changedTouches) e = e.changedTouches[0];
1095     var svg = container.ownerSVGElement || container;
1096     if (svg.createSVGPoint) {
1097       var point = svg.createSVGPoint();
1098       point.x = e.clientX, point.y = e.clientY;
1099       point = point.matrixTransform(container.getScreenCTM().inverse());
1100       return [ point.x, point.y ];
1101     }
1102     var rect = container.getBoundingClientRect();
1103     return [ e.clientX - rect.left - container.clientLeft, e.clientY - rect.top - container.clientTop ];
1104   }
1105   d3.touches = function(container, touches) {
1106     if (arguments.length < 2) touches = d3_eventSource().touches;
1107     return touches ? d3_array(touches).map(function(touch) {
1108       var point = d3_mousePoint(container, touch);
1109       point.identifier = touch.identifier;
1110       return point;
1111     }) : [];
1112   };
1113   d3.behavior.drag = function() {
1114     var event = d3_eventDispatch(drag, "drag", "dragstart", "dragend"), origin = null, mousedown = dragstart(d3_noop, d3.mouse, d3_behavior_dragMouseSubject, "mousemove", "mouseup"), touchstart = dragstart(d3_behavior_dragTouchId, d3.touch, d3_behavior_dragTouchSubject, "touchmove", "touchend");
1115     function drag() {
1116       this.on("mousedown.drag", mousedown).on("touchstart.drag", touchstart);
1117     }
1118     function dragstart(id, position, subject, move, end) {
1119       return function() {
1120         var that = this, target = d3.event.target, parent = that.parentNode, dispatch = event.of(that, arguments), dragged = 0, dragId = id(), dragName = ".drag" + (dragId == null ? "" : "-" + dragId), dragOffset, dragSubject = d3.select(subject()).on(move + dragName, moved).on(end + dragName, ended), dragRestore = d3_event_dragSuppress(), position0 = position(parent, dragId);
1121         if (origin) {
1122           dragOffset = origin.apply(that, arguments);
1123           dragOffset = [ dragOffset.x - position0[0], dragOffset.y - position0[1] ];
1124         } else {
1125           dragOffset = [ 0, 0 ];
1126         }
1127         dispatch({
1128           type: "dragstart"
1129         });
1130         function moved() {
1131           var position1 = position(parent, dragId), dx, dy;
1132           if (!position1) return;
1133           dx = position1[0] - position0[0];
1134           dy = position1[1] - position0[1];
1135           dragged |= dx | dy;
1136           position0 = position1;
1137           dispatch({
1138             type: "drag",
1139             x: position1[0] + dragOffset[0],
1140             y: position1[1] + dragOffset[1],
1141             dx: dx,
1142             dy: dy
1143           });
1144         }
1145         function ended() {
1146           if (!position(parent, dragId)) return;
1147           dragSubject.on(move + dragName, null).on(end + dragName, null);
1148           dragRestore(dragged && d3.event.target === target);
1149           dispatch({
1150             type: "dragend"
1151           });
1152         }
1153       };
1154     }
1155     drag.origin = function(x) {
1156       if (!arguments.length) return origin;
1157       origin = x;
1158       return drag;
1159     };
1160     return d3.rebind(drag, event, "on");
1161   };
1162   function d3_behavior_dragTouchId() {
1163     return d3.event.changedTouches[0].identifier;
1164   }
1165   function d3_behavior_dragTouchSubject() {
1166     return d3.event.target;
1167   }
1168   function d3_behavior_dragMouseSubject() {
1169     return d3_window;
1170   }
1171   var π = Math.PI, τ = 2 * π, halfπ = π / 2, ε = 1e-6, ε2 = ε * ε, d3_radians = π / 180, d3_degrees = 180 / π;
1172   function d3_sgn(x) {
1173     return x > 0 ? 1 : x < 0 ? -1 : 0;
1174   }
1175   function d3_cross2d(a, b, c) {
1176     return (b[0] - a[0]) * (c[1] - a[1]) - (b[1] - a[1]) * (c[0] - a[0]);
1177   }
1178   function d3_acos(x) {
1179     return x > 1 ? 0 : x < -1 ? π : Math.acos(x);
1180   }
1181   function d3_asin(x) {
1182     return x > 1 ? halfπ : x < -1 ? -halfπ : Math.asin(x);
1183   }
1184   function d3_sinh(x) {
1185     return ((x = Math.exp(x)) - 1 / x) / 2;
1186   }
1187   function d3_cosh(x) {
1188     return ((x = Math.exp(x)) + 1 / x) / 2;
1189   }
1190   function d3_tanh(x) {
1191     return ((x = Math.exp(2 * x)) - 1) / (x + 1);
1192   }
1193   function d3_haversin(x) {
1194     return (x = Math.sin(x / 2)) * x;
1195   }
1196   var ρ = Math.SQRT2, ρ2 = 2, ρ4 = 4;
1197   d3.interpolateZoom = function(p0, p1) {
1198     var ux0 = p0[0], uy0 = p0[1], w0 = p0[2], ux1 = p1[0], uy1 = p1[1], w1 = p1[2];
1199     var dx = ux1 - ux0, dy = uy1 - uy0, d2 = dx * dx + dy * dy, d1 = Math.sqrt(d2), b0 = (w1 * w1 - w0 * w0 + ρ4 * d2) / (2 * w0 * ρ2 * d1), b1 = (w1 * w1 - w0 * w0 - ρ4 * d2) / (2 * w1 * ρ2 * d1), r0 = Math.log(Math.sqrt(b0 * b0 + 1) - b0), r1 = Math.log(Math.sqrt(b1 * b1 + 1) - b1), dr = r1 - r0, S = (dr || Math.log(w1 / w0)) / ρ;
1200     function interpolate(t) {
1201       var s = t * S;
1202       if (dr) {
1203         var coshr0 = d3_cosh(r0), u = w0 / (ρ2 * d1) * (coshr0 * d3_tanh(ρ * s + r0) - d3_sinh(r0));
1204         return [ ux0 + u * dx, uy0 + u * dy, w0 * coshr0 / d3_cosh(ρ * s + r0) ];
1205       }
1206       return [ ux0 + t * dx, uy0 + t * dy, w0 * Math.exp(ρ * s) ];
1207     }
1208     interpolate.duration = S * 1e3;
1209     return interpolate;
1210   };
1211   d3.behavior.zoom = function() {
1212     var view = {
1213       x: 0,
1214       y: 0,
1215       k: 1
1216     }, translate0, center, size = [ 960, 500 ], scaleExtent = d3_behavior_zoomInfinity, mousedown = "mousedown.zoom", mousemove = "mousemove.zoom", mouseup = "mouseup.zoom", mousewheelTimer, touchstart = "touchstart.zoom", touchtime, event = d3_eventDispatch(zoom, "zoomstart", "zoom", "zoomend"), x0, x1, y0, y1;
1217     function zoom(g) {
1218       g.on(mousedown, mousedowned).on(d3_behavior_zoomWheel + ".zoom", mousewheeled).on(mousemove, mousewheelreset).on("dblclick.zoom", dblclicked).on(touchstart, touchstarted);
1219     }
1220     zoom.event = function(g) {
1221       g.each(function() {
1222         var dispatch = event.of(this, arguments), view1 = view;
1223         if (d3_transitionInheritId) {
1224           d3.select(this).transition().each("start.zoom", function() {
1225             view = this.__chart__ || {
1226               x: 0,
1227               y: 0,
1228               k: 1
1229             };
1230             zoomstarted(dispatch);
1231           }).tween("zoom:zoom", function() {
1232             var dx = size[0], dy = size[1], cx = dx / 2, cy = dy / 2, i = d3.interpolateZoom([ (cx - view.x) / view.k, (cy - view.y) / view.k, dx / view.k ], [ (cx - view1.x) / view1.k, (cy - view1.y) / view1.k, dx / view1.k ]);
1233             return function(t) {
1234               var l = i(t), k = dx / l[2];
1235               this.__chart__ = view = {
1236                 x: cx - l[0] * k,
1237                 y: cy - l[1] * k,
1238                 k: k
1239               };
1240               zoomed(dispatch);
1241             };
1242           }).each("end.zoom", function() {
1243             zoomended(dispatch);
1244           });
1245         } else {
1246           this.__chart__ = view;
1247           zoomstarted(dispatch);
1248           zoomed(dispatch);
1249           zoomended(dispatch);
1250         }
1251       });
1252     };
1253     zoom.translate = function(_) {
1254       if (!arguments.length) return [ view.x, view.y ];
1255       view = {
1256         x: +_[0],
1257         y: +_[1],
1258         k: view.k
1259       };
1260       rescale();
1261       return zoom;
1262     };
1263     zoom.scale = function(_) {
1264       if (!arguments.length) return view.k;
1265       view = {
1266         x: view.x,
1267         y: view.y,
1268         k: +_
1269       };
1270       rescale();
1271       return zoom;
1272     };
1273     zoom.scaleExtent = function(_) {
1274       if (!arguments.length) return scaleExtent;
1275       scaleExtent = _ == null ? d3_behavior_zoomInfinity : [ +_[0], +_[1] ];
1276       return zoom;
1277     };
1278     zoom.center = function(_) {
1279       if (!arguments.length) return center;
1280       center = _ && [ +_[0], +_[1] ];
1281       return zoom;
1282     };
1283     zoom.size = function(_) {
1284       if (!arguments.length) return size;
1285       size = _ && [ +_[0], +_[1] ];
1286       return zoom;
1287     };
1288     zoom.x = function(z) {
1289       if (!arguments.length) return x1;
1290       x1 = z;
1291       x0 = z.copy();
1292       view = {
1293         x: 0,
1294         y: 0,
1295         k: 1
1296       };
1297       return zoom;
1298     };
1299     zoom.y = function(z) {
1300       if (!arguments.length) return y1;
1301       y1 = z;
1302       y0 = z.copy();
1303       view = {
1304         x: 0,
1305         y: 0,
1306         k: 1
1307       };
1308       return zoom;
1309     };
1310     function location(p) {
1311       return [ (p[0] - view.x) / view.k, (p[1] - view.y) / view.k ];
1312     }
1313     function point(l) {
1314       return [ l[0] * view.k + view.x, l[1] * view.k + view.y ];
1315     }
1316     function scaleTo(s) {
1317       view.k = Math.max(scaleExtent[0], Math.min(scaleExtent[1], s));
1318     }
1319     function translateTo(p, l) {
1320       l = point(l);
1321       view.x += p[0] - l[0];
1322       view.y += p[1] - l[1];
1323     }
1324     function rescale() {
1325       if (x1) x1.domain(x0.range().map(function(x) {
1326         return (x - view.x) / view.k;
1327       }).map(x0.invert));
1328       if (y1) y1.domain(y0.range().map(function(y) {
1329         return (y - view.y) / view.k;
1330       }).map(y0.invert));
1331     }
1332     function zoomstarted(dispatch) {
1333       dispatch({
1334         type: "zoomstart"
1335       });
1336     }
1337     function zoomed(dispatch) {
1338       rescale();
1339       dispatch({
1340         type: "zoom",
1341         scale: view.k,
1342         translate: [ view.x, view.y ]
1343       });
1344     }
1345     function zoomended(dispatch) {
1346       dispatch({
1347         type: "zoomend"
1348       });
1349     }
1350     function mousedowned() {
1351       var that = this, target = d3.event.target, dispatch = event.of(that, arguments), dragged = 0, subject = d3.select(d3_window).on(mousemove, moved).on(mouseup, ended), location0 = location(d3.mouse(that)), dragRestore = d3_event_dragSuppress();
1352       d3_selection_interrupt.call(that);
1353       zoomstarted(dispatch);
1354       function moved() {
1355         dragged = 1;
1356         translateTo(d3.mouse(that), location0);
1357         zoomed(dispatch);
1358       }
1359       function ended() {
1360         subject.on(mousemove, d3_window === that ? mousewheelreset : null).on(mouseup, null);
1361         dragRestore(dragged && d3.event.target === target);
1362         zoomended(dispatch);
1363       }
1364     }
1365     function touchstarted() {
1366       var that = this, dispatch = event.of(that, arguments), locations0 = {}, distance0 = 0, scale0, zoomName = ".zoom-" + d3.event.changedTouches[0].identifier, touchmove = "touchmove" + zoomName, touchend = "touchend" + zoomName, target = d3.select(d3.event.target).on(touchmove, moved).on(touchend, ended), subject = d3.select(that).on(mousedown, null).on(touchstart, started), dragRestore = d3_event_dragSuppress();
1367       d3_selection_interrupt.call(that);
1368       started();
1369       zoomstarted(dispatch);
1370       function relocate() {
1371         var touches = d3.touches(that);
1372         scale0 = view.k;
1373         touches.forEach(function(t) {
1374           if (t.identifier in locations0) locations0[t.identifier] = location(t);
1375         });
1376         return touches;
1377       }
1378       function started() {
1379         var changed = d3.event.changedTouches;
1380         for (var i = 0, n = changed.length; i < n; ++i) {
1381           locations0[changed[i].identifier] = null;
1382         }
1383         var touches = relocate(), now = Date.now();
1384         if (touches.length === 1) {
1385           if (now - touchtime < 500) {
1386             var p = touches[0], l = locations0[p.identifier];
1387             scaleTo(view.k * 2);
1388             translateTo(p, l);
1389             d3_eventPreventDefault();
1390             zoomed(dispatch);
1391           }
1392           touchtime = now;
1393         } else if (touches.length > 1) {
1394           var p = touches[0], q = touches[1], dx = p[0] - q[0], dy = p[1] - q[1];
1395           distance0 = dx * dx + dy * dy;
1396         }
1397       }
1398       function moved() {
1399         var touches = d3.touches(that), p0, l0, p1, l1;
1400         for (var i = 0, n = touches.length; i < n; ++i, l1 = null) {
1401           p1 = touches[i];
1402           if (l1 = locations0[p1.identifier]) {
1403             if (l0) break;
1404             p0 = p1, l0 = l1;
1405           }
1406         }
1407         if (l1) {
1408           var distance1 = (distance1 = p1[0] - p0[0]) * distance1 + (distance1 = p1[1] - p0[1]) * distance1, scale1 = distance0 && Math.sqrt(distance1 / distance0);
1409           p0 = [ (p0[0] + p1[0]) / 2, (p0[1] + p1[1]) / 2 ];
1410           l0 = [ (l0[0] + l1[0]) / 2, (l0[1] + l1[1]) / 2 ];
1411           scaleTo(scale1 * scale0);
1412         }
1413         touchtime = null;
1414         translateTo(p0, l0);
1415         zoomed(dispatch);
1416       }
1417       function ended() {
1418         if (d3.event.touches.length) {
1419           var changed = d3.event.changedTouches;
1420           for (var i = 0, n = changed.length; i < n; ++i) {
1421             delete locations0[changed[i].identifier];
1422           }
1423           for (var identifier in locations0) {
1424             return void relocate();
1425           }
1426         }
1427         target.on(zoomName, null);
1428         subject.on(mousedown, mousedowned).on(touchstart, touchstarted);
1429         dragRestore();
1430         zoomended(dispatch);
1431       }
1432     }
1433     function mousewheeled() {
1434       var dispatch = event.of(this, arguments);
1435       if (mousewheelTimer) clearTimeout(mousewheelTimer); else d3_selection_interrupt.call(this),
1436       zoomstarted(dispatch);
1437       mousewheelTimer = setTimeout(function() {
1438         mousewheelTimer = null;
1439         zoomended(dispatch);
1440       }, 50);
1441       d3_eventPreventDefault();
1442       var point = center || d3.mouse(this);
1443       if (!translate0) translate0 = location(point);
1444       scaleTo(Math.pow(2, d3_behavior_zoomDelta() * .002) * view.k);
1445       translateTo(point, translate0);
1446       zoomed(dispatch);
1447     }
1448     function mousewheelreset() {
1449       translate0 = null;
1450     }
1451     function dblclicked() {
1452       var dispatch = event.of(this, arguments), p = d3.mouse(this), l = location(p), k = Math.log(view.k) / Math.LN2;
1453       zoomstarted(dispatch);
1454       scaleTo(Math.pow(2, d3.event.shiftKey ? Math.ceil(k) - 1 : Math.floor(k) + 1));
1455       translateTo(p, l);
1456       zoomed(dispatch);
1457       zoomended(dispatch);
1458     }
1459     return d3.rebind(zoom, event, "on");
1460   };
1461   var d3_behavior_zoomInfinity = [ 0, Infinity ];
1462   var d3_behavior_zoomDelta, d3_behavior_zoomWheel = "onwheel" in d3_document ? (d3_behavior_zoomDelta = function() {
1463     return -d3.event.deltaY * (d3.event.deltaMode ? 120 : 1);
1464   }, "wheel") : "onmousewheel" in d3_document ? (d3_behavior_zoomDelta = function() {
1465     return d3.event.wheelDelta;
1466   }, "mousewheel") : (d3_behavior_zoomDelta = function() {
1467     return -d3.event.detail;
1468   }, "MozMousePixelScroll");
1469   function d3_Color() {}
1470   d3_Color.prototype.toString = function() {
1471     return this.rgb() + "";
1472   };
1473   d3.hsl = function(h, s, l) {
1474     return arguments.length === 1 ? h instanceof d3_Hsl ? d3_hsl(h.h, h.s, h.l) : d3_rgb_parse("" + h, d3_rgb_hsl, d3_hsl) : d3_hsl(+h, +s, +l);
1475   };
1476   function d3_hsl(h, s, l) {
1477     return new d3_Hsl(h, s, l);
1478   }
1479   function d3_Hsl(h, s, l) {
1480     this.h = h;
1481     this.s = s;
1482     this.l = l;
1483   }
1484   var d3_hslPrototype = d3_Hsl.prototype = new d3_Color();
1485   d3_hslPrototype.brighter = function(k) {
1486     k = Math.pow(.7, arguments.length ? k : 1);
1487     return d3_hsl(this.h, this.s, this.l / k);
1488   };
1489   d3_hslPrototype.darker = function(k) {
1490     k = Math.pow(.7, arguments.length ? k : 1);
1491     return d3_hsl(this.h, this.s, k * this.l);
1492   };
1493   d3_hslPrototype.rgb = function() {
1494     return d3_hsl_rgb(this.h, this.s, this.l);
1495   };
1496   function d3_hsl_rgb(h, s, l) {
1497     var m1, m2;
1498     h = isNaN(h) ? 0 : (h %= 360) < 0 ? h + 360 : h;
1499     s = isNaN(s) ? 0 : s < 0 ? 0 : s > 1 ? 1 : s;
1500     l = l < 0 ? 0 : l > 1 ? 1 : l;
1501     m2 = l <= .5 ? l * (1 + s) : l + s - l * s;
1502     m1 = 2 * l - m2;
1503     function v(h) {
1504       if (h > 360) h -= 360; else if (h < 0) h += 360;
1505       if (h < 60) return m1 + (m2 - m1) * h / 60;
1506       if (h < 180) return m2;
1507       if (h < 240) return m1 + (m2 - m1) * (240 - h) / 60;
1508       return m1;
1509     }
1510     function vv(h) {
1511       return Math.round(v(h) * 255);
1512     }
1513     return d3_rgb(vv(h + 120), vv(h), vv(h - 120));
1514   }
1515   d3.hcl = function(h, c, l) {
1516     return arguments.length === 1 ? h instanceof d3_Hcl ? d3_hcl(h.h, h.c, h.l) : h instanceof d3_Lab ? d3_lab_hcl(h.l, h.a, h.b) : d3_lab_hcl((h = d3_rgb_lab((h = d3.rgb(h)).r, h.g, h.b)).l, h.a, h.b) : d3_hcl(+h, +c, +l);
1517   };
1518   function d3_hcl(h, c, l) {
1519     return new d3_Hcl(h, c, l);
1520   }
1521   function d3_Hcl(h, c, l) {
1522     this.h = h;
1523     this.c = c;
1524     this.l = l;
1525   }
1526   var d3_hclPrototype = d3_Hcl.prototype = new d3_Color();
1527   d3_hclPrototype.brighter = function(k) {
1528     return d3_hcl(this.h, this.c, Math.min(100, this.l + d3_lab_K * (arguments.length ? k : 1)));
1529   };
1530   d3_hclPrototype.darker = function(k) {
1531     return d3_hcl(this.h, this.c, Math.max(0, this.l - d3_lab_K * (arguments.length ? k : 1)));
1532   };
1533   d3_hclPrototype.rgb = function() {
1534     return d3_hcl_lab(this.h, this.c, this.l).rgb();
1535   };
1536   function d3_hcl_lab(h, c, l) {
1537     if (isNaN(h)) h = 0;
1538     if (isNaN(c)) c = 0;
1539     return d3_lab(l, Math.cos(h *= d3_radians) * c, Math.sin(h) * c);
1540   }
1541   d3.lab = function(l, a, b) {
1542     return arguments.length === 1 ? l instanceof d3_Lab ? d3_lab(l.l, l.a, l.b) : l instanceof d3_Hcl ? d3_hcl_lab(l.l, l.c, l.h) : d3_rgb_lab((l = d3.rgb(l)).r, l.g, l.b) : d3_lab(+l, +a, +b);
1543   };
1544   function d3_lab(l, a, b) {
1545     return new d3_Lab(l, a, b);
1546   }
1547   function d3_Lab(l, a, b) {
1548     this.l = l;
1549     this.a = a;
1550     this.b = b;
1551   }
1552   var d3_lab_K = 18;
1553   var d3_lab_X = .95047, d3_lab_Y = 1, d3_lab_Z = 1.08883;
1554   var d3_labPrototype = d3_Lab.prototype = new d3_Color();
1555   d3_labPrototype.brighter = function(k) {
1556     return d3_lab(Math.min(100, this.l + d3_lab_K * (arguments.length ? k : 1)), this.a, this.b);
1557   };
1558   d3_labPrototype.darker = function(k) {
1559     return d3_lab(Math.max(0, this.l - d3_lab_K * (arguments.length ? k : 1)), this.a, this.b);
1560   };
1561   d3_labPrototype.rgb = function() {
1562     return d3_lab_rgb(this.l, this.a, this.b);
1563   };
1564   function d3_lab_rgb(l, a, b) {
1565     var y = (l + 16) / 116, x = y + a / 500, z = y - b / 200;
1566     x = d3_lab_xyz(x) * d3_lab_X;
1567     y = d3_lab_xyz(y) * d3_lab_Y;
1568     z = d3_lab_xyz(z) * d3_lab_Z;
1569     return d3_rgb(d3_xyz_rgb(3.2404542 * x - 1.5371385 * y - .4985314 * z), d3_xyz_rgb(-.969266 * x + 1.8760108 * y + .041556 * z), d3_xyz_rgb(.0556434 * x - .2040259 * y + 1.0572252 * z));
1570   }
1571   function d3_lab_hcl(l, a, b) {
1572     return l > 0 ? d3_hcl(Math.atan2(b, a) * d3_degrees, Math.sqrt(a * a + b * b), l) : d3_hcl(NaN, NaN, l);
1573   }
1574   function d3_lab_xyz(x) {
1575     return x > .206893034 ? x * x * x : (x - 4 / 29) / 7.787037;
1576   }
1577   function d3_xyz_lab(x) {
1578     return x > .008856 ? Math.pow(x, 1 / 3) : 7.787037 * x + 4 / 29;
1579   }
1580   function d3_xyz_rgb(r) {
1581     return Math.round(255 * (r <= .00304 ? 12.92 * r : 1.055 * Math.pow(r, 1 / 2.4) - .055));
1582   }
1583   d3.rgb = function(r, g, b) {
1584     return arguments.length === 1 ? r instanceof d3_Rgb ? d3_rgb(r.r, r.g, r.b) : d3_rgb_parse("" + r, d3_rgb, d3_hsl_rgb) : d3_rgb(~~r, ~~g, ~~b);
1585   };
1586   function d3_rgbNumber(value) {
1587     return d3_rgb(value >> 16, value >> 8 & 255, value & 255);
1588   }
1589   function d3_rgbString(value) {
1590     return d3_rgbNumber(value) + "";
1591   }
1592   function d3_rgb(r, g, b) {
1593     return new d3_Rgb(r, g, b);
1594   }
1595   function d3_Rgb(r, g, b) {
1596     this.r = r;
1597     this.g = g;
1598     this.b = b;
1599   }
1600   var d3_rgbPrototype = d3_Rgb.prototype = new d3_Color();
1601   d3_rgbPrototype.brighter = function(k) {
1602     k = Math.pow(.7, arguments.length ? k : 1);
1603     var r = this.r, g = this.g, b = this.b, i = 30;
1604     if (!r && !g && !b) return d3_rgb(i, i, i);
1605     if (r && r < i) r = i;
1606     if (g && g < i) g = i;
1607     if (b && b < i) b = i;
1608     return d3_rgb(Math.min(255, ~~(r / k)), Math.min(255, ~~(g / k)), Math.min(255, ~~(b / k)));
1609   };
1610   d3_rgbPrototype.darker = function(k) {
1611     k = Math.pow(.7, arguments.length ? k : 1);
1612     return d3_rgb(~~(k * this.r), ~~(k * this.g), ~~(k * this.b));
1613   };
1614   d3_rgbPrototype.hsl = function() {
1615     return d3_rgb_hsl(this.r, this.g, this.b);
1616   };
1617   d3_rgbPrototype.toString = function() {
1618     return "#" + d3_rgb_hex(this.r) + d3_rgb_hex(this.g) + d3_rgb_hex(this.b);
1619   };
1620   function d3_rgb_hex(v) {
1621     return v < 16 ? "0" + Math.max(0, v).toString(16) : Math.min(255, v).toString(16);
1622   }
1623   function d3_rgb_parse(format, rgb, hsl) {
1624     var r = 0, g = 0, b = 0, m1, m2, color;
1625     m1 = /([a-z]+)\((.*)\)/i.exec(format);
1626     if (m1) {
1627       m2 = m1[2].split(",");
1628       switch (m1[1]) {
1629        case "hsl":
1630         {
1631           return hsl(parseFloat(m2[0]), parseFloat(m2[1]) / 100, parseFloat(m2[2]) / 100);
1632         }
1633
1634        case "rgb":
1635         {
1636           return rgb(d3_rgb_parseNumber(m2[0]), d3_rgb_parseNumber(m2[1]), d3_rgb_parseNumber(m2[2]));
1637         }
1638       }
1639     }
1640     if (color = d3_rgb_names.get(format)) return rgb(color.r, color.g, color.b);
1641     if (format != null && format.charAt(0) === "#" && !isNaN(color = parseInt(format.substring(1), 16))) {
1642       if (format.length === 4) {
1643         r = (color & 3840) >> 4;
1644         r = r >> 4 | r;
1645         g = color & 240;
1646         g = g >> 4 | g;
1647         b = color & 15;
1648         b = b << 4 | b;
1649       } else if (format.length === 7) {
1650         r = (color & 16711680) >> 16;
1651         g = (color & 65280) >> 8;
1652         b = color & 255;
1653       }
1654     }
1655     return rgb(r, g, b);
1656   }
1657   function d3_rgb_hsl(r, g, b) {
1658     var min = Math.min(r /= 255, g /= 255, b /= 255), max = Math.max(r, g, b), d = max - min, h, s, l = (max + min) / 2;
1659     if (d) {
1660       s = l < .5 ? d / (max + min) : d / (2 - max - min);
1661       if (r == max) h = (g - b) / d + (g < b ? 6 : 0); else if (g == max) h = (b - r) / d + 2; else h = (r - g) / d + 4;
1662       h *= 60;
1663     } else {
1664       h = NaN;
1665       s = l > 0 && l < 1 ? 0 : h;
1666     }
1667     return d3_hsl(h, s, l);
1668   }
1669   function d3_rgb_lab(r, g, b) {
1670     r = d3_rgb_xyz(r);
1671     g = d3_rgb_xyz(g);
1672     b = d3_rgb_xyz(b);
1673     var x = d3_xyz_lab((.4124564 * r + .3575761 * g + .1804375 * b) / d3_lab_X), y = d3_xyz_lab((.2126729 * r + .7151522 * g + .072175 * b) / d3_lab_Y), z = d3_xyz_lab((.0193339 * r + .119192 * g + .9503041 * b) / d3_lab_Z);
1674     return d3_lab(116 * y - 16, 500 * (x - y), 200 * (y - z));
1675   }
1676   function d3_rgb_xyz(r) {
1677     return (r /= 255) <= .04045 ? r / 12.92 : Math.pow((r + .055) / 1.055, 2.4);
1678   }
1679   function d3_rgb_parseNumber(c) {
1680     var f = parseFloat(c);
1681     return c.charAt(c.length - 1) === "%" ? Math.round(f * 2.55) : f;
1682   }
1683   var d3_rgb_names = d3.map({
1684     aliceblue: 15792383,
1685     antiquewhite: 16444375,
1686     aqua: 65535,
1687     aquamarine: 8388564,
1688     azure: 15794175,
1689     beige: 16119260,
1690     bisque: 16770244,
1691     black: 0,
1692     blanchedalmond: 16772045,
1693     blue: 255,
1694     blueviolet: 9055202,
1695     brown: 10824234,
1696     burlywood: 14596231,
1697     cadetblue: 6266528,
1698     chartreuse: 8388352,
1699     chocolate: 13789470,
1700     coral: 16744272,
1701     cornflowerblue: 6591981,
1702     cornsilk: 16775388,
1703     crimson: 14423100,
1704     cyan: 65535,
1705     darkblue: 139,
1706     darkcyan: 35723,
1707     darkgoldenrod: 12092939,
1708     darkgray: 11119017,
1709     darkgreen: 25600,
1710     darkgrey: 11119017,
1711     darkkhaki: 12433259,
1712     darkmagenta: 9109643,
1713     darkolivegreen: 5597999,
1714     darkorange: 16747520,
1715     darkorchid: 10040012,
1716     darkred: 9109504,
1717     darksalmon: 15308410,
1718     darkseagreen: 9419919,
1719     darkslateblue: 4734347,
1720     darkslategray: 3100495,
1721     darkslategrey: 3100495,
1722     darkturquoise: 52945,
1723     darkviolet: 9699539,
1724     deeppink: 16716947,
1725     deepskyblue: 49151,
1726     dimgray: 6908265,
1727     dimgrey: 6908265,
1728     dodgerblue: 2003199,
1729     firebrick: 11674146,
1730     floralwhite: 16775920,
1731     forestgreen: 2263842,
1732     fuchsia: 16711935,
1733     gainsboro: 14474460,
1734     ghostwhite: 16316671,
1735     gold: 16766720,
1736     goldenrod: 14329120,
1737     gray: 8421504,
1738     green: 32768,
1739     greenyellow: 11403055,
1740     grey: 8421504,
1741     honeydew: 15794160,
1742     hotpink: 16738740,
1743     indianred: 13458524,
1744     indigo: 4915330,
1745     ivory: 16777200,
1746     khaki: 15787660,
1747     lavender: 15132410,
1748     lavenderblush: 16773365,
1749     lawngreen: 8190976,
1750     lemonchiffon: 16775885,
1751     lightblue: 11393254,
1752     lightcoral: 15761536,
1753     lightcyan: 14745599,
1754     lightgoldenrodyellow: 16448210,
1755     lightgray: 13882323,
1756     lightgreen: 9498256,
1757     lightgrey: 13882323,
1758     lightpink: 16758465,
1759     lightsalmon: 16752762,
1760     lightseagreen: 2142890,
1761     lightskyblue: 8900346,
1762     lightslategray: 7833753,
1763     lightslategrey: 7833753,
1764     lightsteelblue: 11584734,
1765     lightyellow: 16777184,
1766     lime: 65280,
1767     limegreen: 3329330,
1768     linen: 16445670,
1769     magenta: 16711935,
1770     maroon: 8388608,
1771     mediumaquamarine: 6737322,
1772     mediumblue: 205,
1773     mediumorchid: 12211667,
1774     mediumpurple: 9662683,
1775     mediumseagreen: 3978097,
1776     mediumslateblue: 8087790,
1777     mediumspringgreen: 64154,
1778     mediumturquoise: 4772300,
1779     mediumvioletred: 13047173,
1780     midnightblue: 1644912,
1781     mintcream: 16121850,
1782     mistyrose: 16770273,
1783     moccasin: 16770229,
1784     navajowhite: 16768685,
1785     navy: 128,
1786     oldlace: 16643558,
1787     olive: 8421376,
1788     olivedrab: 7048739,
1789     orange: 16753920,
1790     orangered: 16729344,
1791     orchid: 14315734,
1792     palegoldenrod: 15657130,
1793     palegreen: 10025880,
1794     paleturquoise: 11529966,
1795     palevioletred: 14381203,
1796     papayawhip: 16773077,
1797     peachpuff: 16767673,
1798     peru: 13468991,
1799     pink: 16761035,
1800     plum: 14524637,
1801     powderblue: 11591910,
1802     purple: 8388736,
1803     red: 16711680,
1804     rosybrown: 12357519,
1805     royalblue: 4286945,
1806     saddlebrown: 9127187,
1807     salmon: 16416882,
1808     sandybrown: 16032864,
1809     seagreen: 3050327,
1810     seashell: 16774638,
1811     sienna: 10506797,
1812     silver: 12632256,
1813     skyblue: 8900331,
1814     slateblue: 6970061,
1815     slategray: 7372944,
1816     slategrey: 7372944,
1817     snow: 16775930,
1818     springgreen: 65407,
1819     steelblue: 4620980,
1820     tan: 13808780,
1821     teal: 32896,
1822     thistle: 14204888,
1823     tomato: 16737095,
1824     turquoise: 4251856,
1825     violet: 15631086,
1826     wheat: 16113331,
1827     white: 16777215,
1828     whitesmoke: 16119285,
1829     yellow: 16776960,
1830     yellowgreen: 10145074
1831   });
1832   d3_rgb_names.forEach(function(key, value) {
1833     d3_rgb_names.set(key, d3_rgbNumber(value));
1834   });
1835   function d3_functor(v) {
1836     return typeof v === "function" ? v : function() {
1837       return v;
1838     };
1839   }
1840   d3.functor = d3_functor;
1841   function d3_identity(d) {
1842     return d;
1843   }
1844   d3.xhr = d3_xhrType(d3_identity);
1845   function d3_xhrType(response) {
1846     return function(url, mimeType, callback) {
1847       if (arguments.length === 2 && typeof mimeType === "function") callback = mimeType,
1848       mimeType = null;
1849       return d3_xhr(url, mimeType, response, callback);
1850     };
1851   }
1852   function d3_xhr(url, mimeType, response, callback) {
1853     var xhr = {}, dispatch = d3.dispatch("beforesend", "progress", "load", "error"), headers = {}, request = new XMLHttpRequest(), responseType = null;
1854     if (d3_window.XDomainRequest && !("withCredentials" in request) && /^(http(s)?:)?\/\//.test(url)) request = new XDomainRequest();
1855     "onload" in request ? request.onload = request.onerror = respond : request.onreadystatechange = function() {
1856       request.readyState > 3 && respond();
1857     };
1858     function respond() {
1859       var status = request.status, result;
1860       if (!status && request.responseText || status >= 200 && status < 300 || status === 304) {
1861         try {
1862           result = response.call(xhr, request);
1863         } catch (e) {
1864           dispatch.error.call(xhr, e);
1865           return;
1866         }
1867         dispatch.load.call(xhr, result);
1868       } else {
1869         dispatch.error.call(xhr, request);
1870       }
1871     }
1872     request.onprogress = function(event) {
1873       var o = d3.event;
1874       d3.event = event;
1875       try {
1876         dispatch.progress.call(xhr, request);
1877       } finally {
1878         d3.event = o;
1879       }
1880     };
1881     xhr.header = function(name, value) {
1882       name = (name + "").toLowerCase();
1883       if (arguments.length < 2) return headers[name];
1884       if (value == null) delete headers[name]; else headers[name] = value + "";
1885       return xhr;
1886     };
1887     xhr.mimeType = function(value) {
1888       if (!arguments.length) return mimeType;
1889       mimeType = value == null ? null : value + "";
1890       return xhr;
1891     };
1892     xhr.responseType = function(value) {
1893       if (!arguments.length) return responseType;
1894       responseType = value;
1895       return xhr;
1896     };
1897     xhr.response = function(value) {
1898       response = value;
1899       return xhr;
1900     };
1901     [ "get", "post" ].forEach(function(method) {
1902       xhr[method] = function() {
1903         return xhr.send.apply(xhr, [ method ].concat(d3_array(arguments)));
1904       };
1905     });
1906     xhr.send = function(method, data, callback) {
1907       if (arguments.length === 2 && typeof data === "function") callback = data, data = null;
1908       request.open(method, url, true);
1909       if (mimeType != null && !("accept" in headers)) headers["accept"] = mimeType + ",*/*";
1910       if (request.setRequestHeader) for (var name in headers) request.setRequestHeader(name, headers[name]);
1911       if (mimeType != null && request.overrideMimeType) request.overrideMimeType(mimeType);
1912       if (responseType != null) request.responseType = responseType;
1913       if (callback != null) xhr.on("error", callback).on("load", function(request) {
1914         callback(null, request);
1915       });
1916       dispatch.beforesend.call(xhr, request);
1917       request.send(data == null ? null : data);
1918       return xhr;
1919     };
1920     xhr.abort = function() {
1921       request.abort();
1922       return xhr;
1923     };
1924     d3.rebind(xhr, dispatch, "on");
1925     return callback == null ? xhr : xhr.get(d3_xhr_fixCallback(callback));
1926   }
1927   function d3_xhr_fixCallback(callback) {
1928     return callback.length === 1 ? function(error, request) {
1929       callback(error == null ? request : null);
1930     } : callback;
1931   }
1932   d3.dsv = function(delimiter, mimeType) {
1933     var reFormat = new RegExp('["' + delimiter + "\n]"), delimiterCode = delimiter.charCodeAt(0);
1934     function dsv(url, row, callback) {
1935       if (arguments.length < 3) callback = row, row = null;
1936       var xhr = d3_xhr(url, mimeType, row == null ? response : typedResponse(row), callback);
1937       xhr.row = function(_) {
1938         return arguments.length ? xhr.response((row = _) == null ? response : typedResponse(_)) : row;
1939       };
1940       return xhr;
1941     }
1942     function response(request) {
1943       return dsv.parse(request.responseText);
1944     }
1945     function typedResponse(f) {
1946       return function(request) {
1947         return dsv.parse(request.responseText, f);
1948       };
1949     }
1950     dsv.parse = function(text, f) {
1951       var o;
1952       return dsv.parseRows(text, function(row, i) {
1953         if (o) return o(row, i - 1);
1954         var a = new Function("d", "return {" + row.map(function(name, i) {
1955           return JSON.stringify(name) + ": d[" + i + "]";
1956         }).join(",") + "}");
1957         o = f ? function(row, i) {
1958           return f(a(row), i);
1959         } : a;
1960       });
1961     };
1962     dsv.parseRows = function(text, f) {
1963       var EOL = {}, EOF = {}, rows = [], N = text.length, I = 0, n = 0, t, eol;
1964       function token() {
1965         if (I >= N) return EOF;
1966         if (eol) return eol = false, EOL;
1967         var j = I;
1968         if (text.charCodeAt(j) === 34) {
1969           var i = j;
1970           while (i++ < N) {
1971             if (text.charCodeAt(i) === 34) {
1972               if (text.charCodeAt(i + 1) !== 34) break;
1973               ++i;
1974             }
1975           }
1976           I = i + 2;
1977           var c = text.charCodeAt(i + 1);
1978           if (c === 13) {
1979             eol = true;
1980             if (text.charCodeAt(i + 2) === 10) ++I;
1981           } else if (c === 10) {
1982             eol = true;
1983           }
1984           return text.substring(j + 1, i).replace(/""/g, '"');
1985         }
1986         while (I < N) {
1987           var c = text.charCodeAt(I++), k = 1;
1988           if (c === 10) eol = true; else if (c === 13) {
1989             eol = true;
1990             if (text.charCodeAt(I) === 10) ++I, ++k;
1991           } else if (c !== delimiterCode) continue;
1992           return text.substring(j, I - k);
1993         }
1994         return text.substring(j);
1995       }
1996       while ((t = token()) !== EOF) {
1997         var a = [];
1998         while (t !== EOL && t !== EOF) {
1999           a.push(t);
2000           t = token();
2001         }
2002         if (f && !(a = f(a, n++))) continue;
2003         rows.push(a);
2004       }
2005       return rows;
2006     };
2007     dsv.format = function(rows) {
2008       if (Array.isArray(rows[0])) return dsv.formatRows(rows);
2009       var fieldSet = new d3_Set(), fields = [];
2010       rows.forEach(function(row) {
2011         for (var field in row) {
2012           if (!fieldSet.has(field)) {
2013             fields.push(fieldSet.add(field));
2014           }
2015         }
2016       });
2017       return [ fields.map(formatValue).join(delimiter) ].concat(rows.map(function(row) {
2018         return fields.map(function(field) {
2019           return formatValue(row[field]);
2020         }).join(delimiter);
2021       })).join("\n");
2022     };
2023     dsv.formatRows = function(rows) {
2024       return rows.map(formatRow).join("\n");
2025     };
2026     function formatRow(row) {
2027       return row.map(formatValue).join(delimiter);
2028     }
2029     function formatValue(text) {
2030       return reFormat.test(text) ? '"' + text.replace(/\"/g, '""') + '"' : text;
2031     }
2032     return dsv;
2033   };
2034   d3.csv = d3.dsv(",", "text/csv");
2035   d3.tsv = d3.dsv("     ", "text/tab-separated-values");
2036   d3.touch = function(container, touches, identifier) {
2037     if (arguments.length < 3) identifier = touches, touches = d3_eventSource().changedTouches;
2038     if (touches) for (var i = 0, n = touches.length, touch; i < n; ++i) {
2039       if ((touch = touches[i]).identifier === identifier) {
2040         return d3_mousePoint(container, touch);
2041       }
2042     }
2043   };
2044   var d3_timer_queueHead, d3_timer_queueTail, d3_timer_interval, d3_timer_timeout, d3_timer_active, d3_timer_frame = d3_window[d3_vendorSymbol(d3_window, "requestAnimationFrame")] || function(callback) {
2045     setTimeout(callback, 17);
2046   };
2047   d3.timer = function(callback, delay, then) {
2048     var n = arguments.length;
2049     if (n < 2) delay = 0;
2050     if (n < 3) then = Date.now();
2051     var time = then + delay, timer = {
2052       c: callback,
2053       t: time,
2054       f: false,
2055       n: null
2056     };
2057     if (d3_timer_queueTail) d3_timer_queueTail.n = timer; else d3_timer_queueHead = timer;
2058     d3_timer_queueTail = timer;
2059     if (!d3_timer_interval) {
2060       d3_timer_timeout = clearTimeout(d3_timer_timeout);
2061       d3_timer_interval = 1;
2062       d3_timer_frame(d3_timer_step);
2063     }
2064   };
2065   function d3_timer_step() {
2066     var now = d3_timer_mark(), delay = d3_timer_sweep() - now;
2067     if (delay > 24) {
2068       if (isFinite(delay)) {
2069         clearTimeout(d3_timer_timeout);
2070         d3_timer_timeout = setTimeout(d3_timer_step, delay);
2071       }
2072       d3_timer_interval = 0;
2073     } else {
2074       d3_timer_interval = 1;
2075       d3_timer_frame(d3_timer_step);
2076     }
2077   }
2078   d3.timer.flush = function() {
2079     d3_timer_mark();
2080     d3_timer_sweep();
2081   };
2082   function d3_timer_mark() {
2083     var now = Date.now();
2084     d3_timer_active = d3_timer_queueHead;
2085     while (d3_timer_active) {
2086       if (now >= d3_timer_active.t) d3_timer_active.f = d3_timer_active.c(now - d3_timer_active.t);
2087       d3_timer_active = d3_timer_active.n;
2088     }
2089     return now;
2090   }
2091   function d3_timer_sweep() {
2092     var t0, t1 = d3_timer_queueHead, time = Infinity;
2093     while (t1) {
2094       if (t1.f) {
2095         t1 = t0 ? t0.n = t1.n : d3_timer_queueHead = t1.n;
2096       } else {
2097         if (t1.t < time) time = t1.t;
2098         t1 = (t0 = t1).n;
2099       }
2100     }
2101     d3_timer_queueTail = t0;
2102     return time;
2103   }
2104   function d3_format_precision(x, p) {
2105     return p - (x ? Math.ceil(Math.log(x) / Math.LN10) : 1);
2106   }
2107   d3.round = function(x, n) {
2108     return n ? Math.round(x * (n = Math.pow(10, n))) / n : Math.round(x);
2109   };
2110   var d3_formatPrefixes = [ "y", "z", "a", "f", "p", "n", "µ", "m", "", "k", "M", "G", "T", "P", "E", "Z", "Y" ].map(d3_formatPrefix);
2111   d3.formatPrefix = function(value, precision) {
2112     var i = 0;
2113     if (value) {
2114       if (value < 0) value *= -1;
2115       if (precision) value = d3.round(value, d3_format_precision(value, precision));
2116       i = 1 + Math.floor(1e-12 + Math.log(value) / Math.LN10);
2117       i = Math.max(-24, Math.min(24, Math.floor((i - 1) / 3) * 3));
2118     }
2119     return d3_formatPrefixes[8 + i / 3];
2120   };
2121   function d3_formatPrefix(d, i) {
2122     var k = Math.pow(10, abs(8 - i) * 3);
2123     return {
2124       scale: i > 8 ? function(d) {
2125         return d / k;
2126       } : function(d) {
2127         return d * k;
2128       },
2129       symbol: d
2130     };
2131   }
2132   function d3_locale_numberFormat(locale) {
2133     var locale_decimal = locale.decimal, locale_thousands = locale.thousands, locale_grouping = locale.grouping, locale_currency = locale.currency, formatGroup = locale_grouping ? function(value) {
2134       var i = value.length, t = [], j = 0, g = locale_grouping[0];
2135       while (i > 0 && g > 0) {
2136         t.push(value.substring(i -= g, i + g));
2137         g = locale_grouping[j = (j + 1) % locale_grouping.length];
2138       }
2139       return t.reverse().join(locale_thousands);
2140     } : d3_identity;
2141     return function(specifier) {
2142       var match = d3_format_re.exec(specifier), fill = match[1] || " ", align = match[2] || ">", sign = match[3] || "", symbol = match[4] || "", zfill = match[5], width = +match[6], comma = match[7], precision = match[8], type = match[9], scale = 1, prefix = "", suffix = "", integer = false;
2143       if (precision) precision = +precision.substring(1);
2144       if (zfill || fill === "0" && align === "=") {
2145         zfill = fill = "0";
2146         align = "=";
2147         if (comma) width -= Math.floor((width - 1) / 4);
2148       }
2149       switch (type) {
2150        case "n":
2151         comma = true;
2152         type = "g";
2153         break;
2154
2155        case "%":
2156         scale = 100;
2157         suffix = "%";
2158         type = "f";
2159         break;
2160
2161        case "p":
2162         scale = 100;
2163         suffix = "%";
2164         type = "r";
2165         break;
2166
2167        case "b":
2168        case "o":
2169        case "x":
2170        case "X":
2171         if (symbol === "#") prefix = "0" + type.toLowerCase();
2172
2173        case "c":
2174        case "d":
2175         integer = true;
2176         precision = 0;
2177         break;
2178
2179        case "s":
2180         scale = -1;
2181         type = "r";
2182         break;
2183       }
2184       if (symbol === "$") prefix = locale_currency[0], suffix = locale_currency[1];
2185       if (type == "r" && !precision) type = "g";
2186       if (precision != null) {
2187         if (type == "g") precision = Math.max(1, Math.min(21, precision)); else if (type == "e" || type == "f") precision = Math.max(0, Math.min(20, precision));
2188       }
2189       type = d3_format_types.get(type) || d3_format_typeDefault;
2190       var zcomma = zfill && comma;
2191       return function(value) {
2192         var fullSuffix = suffix;
2193         if (integer && value % 1) return "";
2194         var negative = value < 0 || value === 0 && 1 / value < 0 ? (value = -value, "-") : sign;
2195         if (scale < 0) {
2196           var unit = d3.formatPrefix(value, precision);
2197           value = unit.scale(value);
2198           fullSuffix = unit.symbol + suffix;
2199         } else {
2200           value *= scale;
2201         }
2202         value = type(value, precision);
2203         var i = value.lastIndexOf("."), before = i < 0 ? value : value.substring(0, i), after = i < 0 ? "" : locale_decimal + value.substring(i + 1);
2204         if (!zfill && comma) before = formatGroup(before);
2205         var length = prefix.length + before.length + after.length + (zcomma ? 0 : negative.length), padding = length < width ? new Array(length = width - length + 1).join(fill) : "";
2206         if (zcomma) before = formatGroup(padding + before);
2207         negative += prefix;
2208         value = before + after;
2209         return (align === "<" ? negative + value + padding : align === ">" ? padding + negative + value : align === "^" ? padding.substring(0, length >>= 1) + negative + value + padding.substring(length) : negative + (zcomma ? value : padding + value)) + fullSuffix;
2210       };
2211     };
2212   }
2213   var d3_format_re = /(?:([^{])?([<>=^]))?([+\- ])?([$#])?(0)?(\d+)?(,)?(\.-?\d+)?([a-z%])?/i;
2214   var d3_format_types = d3.map({
2215     b: function(x) {
2216       return x.toString(2);
2217     },
2218     c: function(x) {
2219       return String.fromCharCode(x);
2220     },
2221     o: function(x) {
2222       return x.toString(8);
2223     },
2224     x: function(x) {
2225       return x.toString(16);
2226     },
2227     X: function(x) {
2228       return x.toString(16).toUpperCase();
2229     },
2230     g: function(x, p) {
2231       return x.toPrecision(p);
2232     },
2233     e: function(x, p) {
2234       return x.toExponential(p);
2235     },
2236     f: function(x, p) {
2237       return x.toFixed(p);
2238     },
2239     r: function(x, p) {
2240       return (x = d3.round(x, d3_format_precision(x, p))).toFixed(Math.max(0, Math.min(20, d3_format_precision(x * (1 + 1e-15), p))));
2241     }
2242   });
2243   function d3_format_typeDefault(x) {
2244     return x + "";
2245   }
2246   var d3_time = d3.time = {}, d3_date = Date;
2247   function d3_date_utc() {
2248     this._ = new Date(arguments.length > 1 ? Date.UTC.apply(this, arguments) : arguments[0]);
2249   }
2250   d3_date_utc.prototype = {
2251     getDate: function() {
2252       return this._.getUTCDate();
2253     },
2254     getDay: function() {
2255       return this._.getUTCDay();
2256     },
2257     getFullYear: function() {
2258       return this._.getUTCFullYear();
2259     },
2260     getHours: function() {
2261       return this._.getUTCHours();
2262     },
2263     getMilliseconds: function() {
2264       return this._.getUTCMilliseconds();
2265     },
2266     getMinutes: function() {
2267       return this._.getUTCMinutes();
2268     },
2269     getMonth: function() {
2270       return this._.getUTCMonth();
2271     },
2272     getSeconds: function() {
2273       return this._.getUTCSeconds();
2274     },
2275     getTime: function() {
2276       return this._.getTime();
2277     },
2278     getTimezoneOffset: function() {
2279       return 0;
2280     },
2281     valueOf: function() {
2282       return this._.valueOf();
2283     },
2284     setDate: function() {
2285       d3_time_prototype.setUTCDate.apply(this._, arguments);
2286     },
2287     setDay: function() {
2288       d3_time_prototype.setUTCDay.apply(this._, arguments);
2289     },
2290     setFullYear: function() {
2291       d3_time_prototype.setUTCFullYear.apply(this._, arguments);
2292     },
2293     setHours: function() {
2294       d3_time_prototype.setUTCHours.apply(this._, arguments);
2295     },
2296     setMilliseconds: function() {
2297       d3_time_prototype.setUTCMilliseconds.apply(this._, arguments);
2298     },
2299     setMinutes: function() {
2300       d3_time_prototype.setUTCMinutes.apply(this._, arguments);
2301     },
2302     setMonth: function() {
2303       d3_time_prototype.setUTCMonth.apply(this._, arguments);
2304     },
2305     setSeconds: function() {
2306       d3_time_prototype.setUTCSeconds.apply(this._, arguments);
2307     },
2308     setTime: function() {
2309       d3_time_prototype.setTime.apply(this._, arguments);
2310     }
2311   };
2312   var d3_time_prototype = Date.prototype;
2313   function d3_time_interval(local, step, number) {
2314     function round(date) {
2315       var d0 = local(date), d1 = offset(d0, 1);
2316       return date - d0 < d1 - date ? d0 : d1;
2317     }
2318     function ceil(date) {
2319       step(date = local(new d3_date(date - 1)), 1);
2320       return date;
2321     }
2322     function offset(date, k) {
2323       step(date = new d3_date(+date), k);
2324       return date;
2325     }
2326     function range(t0, t1, dt) {
2327       var time = ceil(t0), times = [];
2328       if (dt > 1) {
2329         while (time < t1) {
2330           if (!(number(time) % dt)) times.push(new Date(+time));
2331           step(time, 1);
2332         }
2333       } else {
2334         while (time < t1) times.push(new Date(+time)), step(time, 1);
2335       }
2336       return times;
2337     }
2338     function range_utc(t0, t1, dt) {
2339       try {
2340         d3_date = d3_date_utc;
2341         var utc = new d3_date_utc();
2342         utc._ = t0;
2343         return range(utc, t1, dt);
2344       } finally {
2345         d3_date = Date;
2346       }
2347     }
2348     local.floor = local;
2349     local.round = round;
2350     local.ceil = ceil;
2351     local.offset = offset;
2352     local.range = range;
2353     var utc = local.utc = d3_time_interval_utc(local);
2354     utc.floor = utc;
2355     utc.round = d3_time_interval_utc(round);
2356     utc.ceil = d3_time_interval_utc(ceil);
2357     utc.offset = d3_time_interval_utc(offset);
2358     utc.range = range_utc;
2359     return local;
2360   }
2361   function d3_time_interval_utc(method) {
2362     return function(date, k) {
2363       try {
2364         d3_date = d3_date_utc;
2365         var utc = new d3_date_utc();
2366         utc._ = date;
2367         return method(utc, k)._;
2368       } finally {
2369         d3_date = Date;
2370       }
2371     };
2372   }
2373   d3_time.year = d3_time_interval(function(date) {
2374     date = d3_time.day(date);
2375     date.setMonth(0, 1);
2376     return date;
2377   }, function(date, offset) {
2378     date.setFullYear(date.getFullYear() + offset);
2379   }, function(date) {
2380     return date.getFullYear();
2381   });
2382   d3_time.years = d3_time.year.range;
2383   d3_time.years.utc = d3_time.year.utc.range;
2384   d3_time.day = d3_time_interval(function(date) {
2385     var day = new d3_date(2e3, 0);
2386     day.setFullYear(date.getFullYear(), date.getMonth(), date.getDate());
2387     return day;
2388   }, function(date, offset) {
2389     date.setDate(date.getDate() + offset);
2390   }, function(date) {
2391     return date.getDate() - 1;
2392   });
2393   d3_time.days = d3_time.day.range;
2394   d3_time.days.utc = d3_time.day.utc.range;
2395   d3_time.dayOfYear = function(date) {
2396     var year = d3_time.year(date);
2397     return Math.floor((date - year - (date.getTimezoneOffset() - year.getTimezoneOffset()) * 6e4) / 864e5);
2398   };
2399   [ "sunday", "monday", "tuesday", "wednesday", "thursday", "friday", "saturday" ].forEach(function(day, i) {
2400     i = 7 - i;
2401     var interval = d3_time[day] = d3_time_interval(function(date) {
2402       (date = d3_time.day(date)).setDate(date.getDate() - (date.getDay() + i) % 7);
2403       return date;
2404     }, function(date, offset) {
2405       date.setDate(date.getDate() + Math.floor(offset) * 7);
2406     }, function(date) {
2407       var day = d3_time.year(date).getDay();
2408       return Math.floor((d3_time.dayOfYear(date) + (day + i) % 7) / 7) - (day !== i);
2409     });
2410     d3_time[day + "s"] = interval.range;
2411     d3_time[day + "s"].utc = interval.utc.range;
2412     d3_time[day + "OfYear"] = function(date) {
2413       var day = d3_time.year(date).getDay();
2414       return Math.floor((d3_time.dayOfYear(date) + (day + i) % 7) / 7);
2415     };
2416   });
2417   d3_time.week = d3_time.sunday;
2418   d3_time.weeks = d3_time.sunday.range;
2419   d3_time.weeks.utc = d3_time.sunday.utc.range;
2420   d3_time.weekOfYear = d3_time.sundayOfYear;
2421   function d3_locale_timeFormat(locale) {
2422     var locale_dateTime = locale.dateTime, locale_date = locale.date, locale_time = locale.time, locale_periods = locale.periods, locale_days = locale.days, locale_shortDays = locale.shortDays, locale_months = locale.months, locale_shortMonths = locale.shortMonths;
2423     function d3_time_format(template) {
2424       var n = template.length;
2425       function format(date) {
2426         var string = [], i = -1, j = 0, c, p, f;
2427         while (++i < n) {
2428           if (template.charCodeAt(i) === 37) {
2429             string.push(template.substring(j, i));
2430             if ((p = d3_time_formatPads[c = template.charAt(++i)]) != null) c = template.charAt(++i);
2431             if (f = d3_time_formats[c]) c = f(date, p == null ? c === "e" ? " " : "0" : p);
2432             string.push(c);
2433             j = i + 1;
2434           }
2435         }
2436         string.push(template.substring(j, i));
2437         return string.join("");
2438       }
2439       format.parse = function(string) {
2440         var d = {
2441           y: 1900,
2442           m: 0,
2443           d: 1,
2444           H: 0,
2445           M: 0,
2446           S: 0,
2447           L: 0,
2448           Z: null
2449         }, i = d3_time_parse(d, template, string, 0);
2450         if (i != string.length) return null;
2451         if ("p" in d) d.H = d.H % 12 + d.p * 12;
2452         var localZ = d.Z != null && d3_date !== d3_date_utc, date = new (localZ ? d3_date_utc : d3_date)();
2453         if ("j" in d) date.setFullYear(d.y, 0, d.j); else if ("w" in d && ("W" in d || "U" in d)) {
2454           date.setFullYear(d.y, 0, 1);
2455           date.setFullYear(d.y, 0, "W" in d ? (d.w + 6) % 7 + d.W * 7 - (date.getDay() + 5) % 7 : d.w + d.U * 7 - (date.getDay() + 6) % 7);
2456         } else date.setFullYear(d.y, d.m, d.d);
2457         date.setHours(d.H + Math.floor(d.Z / 100), d.M + d.Z % 100, d.S, d.L);
2458         return localZ ? date._ : date;
2459       };
2460       format.toString = function() {
2461         return template;
2462       };
2463       return format;
2464     }
2465     function d3_time_parse(date, template, string, j) {
2466       var c, p, t, i = 0, n = template.length, m = string.length;
2467       while (i < n) {
2468         if (j >= m) return -1;
2469         c = template.charCodeAt(i++);
2470         if (c === 37) {
2471           t = template.charAt(i++);
2472           p = d3_time_parsers[t in d3_time_formatPads ? template.charAt(i++) : t];
2473           if (!p || (j = p(date, string, j)) < 0) return -1;
2474         } else if (c != string.charCodeAt(j++)) {
2475           return -1;
2476         }
2477       }
2478       return j;
2479     }
2480     d3_time_format.utc = function(template) {
2481       var local = d3_time_format(template);
2482       function format(date) {
2483         try {
2484           d3_date = d3_date_utc;
2485           var utc = new d3_date();
2486           utc._ = date;
2487           return local(utc);
2488         } finally {
2489           d3_date = Date;
2490         }
2491       }
2492       format.parse = function(string) {
2493         try {
2494           d3_date = d3_date_utc;
2495           var date = local.parse(string);
2496           return date && date._;
2497         } finally {
2498           d3_date = Date;
2499         }
2500       };
2501       format.toString = local.toString;
2502       return format;
2503     };
2504     d3_time_format.multi = d3_time_format.utc.multi = d3_time_formatMulti;
2505     var d3_time_periodLookup = d3.map(), d3_time_dayRe = d3_time_formatRe(locale_days), d3_time_dayLookup = d3_time_formatLookup(locale_days), d3_time_dayAbbrevRe = d3_time_formatRe(locale_shortDays), d3_time_dayAbbrevLookup = d3_time_formatLookup(locale_shortDays), d3_time_monthRe = d3_time_formatRe(locale_months), d3_time_monthLookup = d3_time_formatLookup(locale_months), d3_time_monthAbbrevRe = d3_time_formatRe(locale_shortMonths), d3_time_monthAbbrevLookup = d3_time_formatLookup(locale_shortMonths);
2506     locale_periods.forEach(function(p, i) {
2507       d3_time_periodLookup.set(p.toLowerCase(), i);
2508     });
2509     var d3_time_formats = {
2510       a: function(d) {
2511         return locale_shortDays[d.getDay()];
2512       },
2513       A: function(d) {
2514         return locale_days[d.getDay()];
2515       },
2516       b: function(d) {
2517         return locale_shortMonths[d.getMonth()];
2518       },
2519       B: function(d) {
2520         return locale_months[d.getMonth()];
2521       },
2522       c: d3_time_format(locale_dateTime),
2523       d: function(d, p) {
2524         return d3_time_formatPad(d.getDate(), p, 2);
2525       },
2526       e: function(d, p) {
2527         return d3_time_formatPad(d.getDate(), p, 2);
2528       },
2529       H: function(d, p) {
2530         return d3_time_formatPad(d.getHours(), p, 2);
2531       },
2532       I: function(d, p) {
2533         return d3_time_formatPad(d.getHours() % 12 || 12, p, 2);
2534       },
2535       j: function(d, p) {
2536         return d3_time_formatPad(1 + d3_time.dayOfYear(d), p, 3);
2537       },
2538       L: function(d, p) {
2539         return d3_time_formatPad(d.getMilliseconds(), p, 3);
2540       },
2541       m: function(d, p) {
2542         return d3_time_formatPad(d.getMonth() + 1, p, 2);
2543       },
2544       M: function(d, p) {
2545         return d3_time_formatPad(d.getMinutes(), p, 2);
2546       },
2547       p: function(d) {
2548         return locale_periods[+(d.getHours() >= 12)];
2549       },
2550       S: function(d, p) {
2551         return d3_time_formatPad(d.getSeconds(), p, 2);
2552       },
2553       U: function(d, p) {
2554         return d3_time_formatPad(d3_time.sundayOfYear(d), p, 2);
2555       },
2556       w: function(d) {
2557         return d.getDay();
2558       },
2559       W: function(d, p) {
2560         return d3_time_formatPad(d3_time.mondayOfYear(d), p, 2);
2561       },
2562       x: d3_time_format(locale_date),
2563       X: d3_time_format(locale_time),
2564       y: function(d, p) {
2565         return d3_time_formatPad(d.getFullYear() % 100, p, 2);
2566       },
2567       Y: function(d, p) {
2568         return d3_time_formatPad(d.getFullYear() % 1e4, p, 4);
2569       },
2570       Z: d3_time_zone,
2571       "%": function() {
2572         return "%";
2573       }
2574     };
2575     var d3_time_parsers = {
2576       a: d3_time_parseWeekdayAbbrev,
2577       A: d3_time_parseWeekday,
2578       b: d3_time_parseMonthAbbrev,
2579       B: d3_time_parseMonth,
2580       c: d3_time_parseLocaleFull,
2581       d: d3_time_parseDay,
2582       e: d3_time_parseDay,
2583       H: d3_time_parseHour24,
2584       I: d3_time_parseHour24,
2585       j: d3_time_parseDayOfYear,
2586       L: d3_time_parseMilliseconds,
2587       m: d3_time_parseMonthNumber,
2588       M: d3_time_parseMinutes,
2589       p: d3_time_parseAmPm,
2590       S: d3_time_parseSeconds,
2591       U: d3_time_parseWeekNumberSunday,
2592       w: d3_time_parseWeekdayNumber,
2593       W: d3_time_parseWeekNumberMonday,
2594       x: d3_time_parseLocaleDate,
2595       X: d3_time_parseLocaleTime,
2596       y: d3_time_parseYear,
2597       Y: d3_time_parseFullYear,
2598       Z: d3_time_parseZone,
2599       "%": d3_time_parseLiteralPercent
2600     };
2601     function d3_time_parseWeekdayAbbrev(date, string, i) {
2602       d3_time_dayAbbrevRe.lastIndex = 0;
2603       var n = d3_time_dayAbbrevRe.exec(string.substring(i));
2604       return n ? (date.w = d3_time_dayAbbrevLookup.get(n[0].toLowerCase()), i + n[0].length) : -1;
2605     }
2606     function d3_time_parseWeekday(date, string, i) {
2607       d3_time_dayRe.lastIndex = 0;
2608       var n = d3_time_dayRe.exec(string.substring(i));
2609       return n ? (date.w = d3_time_dayLookup.get(n[0].toLowerCase()), i + n[0].length) : -1;
2610     }
2611     function d3_time_parseMonthAbbrev(date, string, i) {
2612       d3_time_monthAbbrevRe.lastIndex = 0;
2613       var n = d3_time_monthAbbrevRe.exec(string.substring(i));
2614       return n ? (date.m = d3_time_monthAbbrevLookup.get(n[0].toLowerCase()), i + n[0].length) : -1;
2615     }
2616     function d3_time_parseMonth(date, string, i) {
2617       d3_time_monthRe.lastIndex = 0;
2618       var n = d3_time_monthRe.exec(string.substring(i));
2619       return n ? (date.m = d3_time_monthLookup.get(n[0].toLowerCase()), i + n[0].length) : -1;
2620     }
2621     function d3_time_parseLocaleFull(date, string, i) {
2622       return d3_time_parse(date, d3_time_formats.c.toString(), string, i);
2623     }
2624     function d3_time_parseLocaleDate(date, string, i) {
2625       return d3_time_parse(date, d3_time_formats.x.toString(), string, i);
2626     }
2627     function d3_time_parseLocaleTime(date, string, i) {
2628       return d3_time_parse(date, d3_time_formats.X.toString(), string, i);
2629     }
2630     function d3_time_parseAmPm(date, string, i) {
2631       var n = d3_time_periodLookup.get(string.substring(i, i += 2).toLowerCase());
2632       return n == null ? -1 : (date.p = n, i);
2633     }
2634     return d3_time_format;
2635   }
2636   var d3_time_formatPads = {
2637     "-": "",
2638     _: " ",
2639     "0": "0"
2640   }, d3_time_numberRe = /^\s*\d+/, d3_time_percentRe = /^%/;
2641   function d3_time_formatPad(value, fill, width) {
2642     var sign = value < 0 ? "-" : "", string = (sign ? -value : value) + "", length = string.length;
2643     return sign + (length < width ? new Array(width - length + 1).join(fill) + string : string);
2644   }
2645   function d3_time_formatRe(names) {
2646     return new RegExp("^(?:" + names.map(d3.requote).join("|") + ")", "i");
2647   }
2648   function d3_time_formatLookup(names) {
2649     var map = new d3_Map(), i = -1, n = names.length;
2650     while (++i < n) map.set(names[i].toLowerCase(), i);
2651     return map;
2652   }
2653   function d3_time_parseWeekdayNumber(date, string, i) {
2654     d3_time_numberRe.lastIndex = 0;
2655     var n = d3_time_numberRe.exec(string.substring(i, i + 1));
2656     return n ? (date.w = +n[0], i + n[0].length) : -1;
2657   }
2658   function d3_time_parseWeekNumberSunday(date, string, i) {
2659     d3_time_numberRe.lastIndex = 0;
2660     var n = d3_time_numberRe.exec(string.substring(i));
2661     return n ? (date.U = +n[0], i + n[0].length) : -1;
2662   }
2663   function d3_time_parseWeekNumberMonday(date, string, i) {
2664     d3_time_numberRe.lastIndex = 0;
2665     var n = d3_time_numberRe.exec(string.substring(i));
2666     return n ? (date.W = +n[0], i + n[0].length) : -1;
2667   }
2668   function d3_time_parseFullYear(date, string, i) {
2669     d3_time_numberRe.lastIndex = 0;
2670     var n = d3_time_numberRe.exec(string.substring(i, i + 4));
2671     return n ? (date.y = +n[0], i + n[0].length) : -1;
2672   }
2673   function d3_time_parseYear(date, string, i) {
2674     d3_time_numberRe.lastIndex = 0;
2675     var n = d3_time_numberRe.exec(string.substring(i, i + 2));
2676     return n ? (date.y = d3_time_expandYear(+n[0]), i + n[0].length) : -1;
2677   }
2678   function d3_time_parseZone(date, string, i) {
2679     return /^[+-]\d{4}$/.test(string = string.substring(i, i + 5)) ? (date.Z = +string,
2680     i + 5) : -1;
2681   }
2682   function d3_time_expandYear(d) {
2683     return d + (d > 68 ? 1900 : 2e3);
2684   }
2685   function d3_time_parseMonthNumber(date, string, i) {
2686     d3_time_numberRe.lastIndex = 0;
2687     var n = d3_time_numberRe.exec(string.substring(i, i + 2));
2688     return n ? (date.m = n[0] - 1, i + n[0].length) : -1;
2689   }
2690   function d3_time_parseDay(date, string, i) {
2691     d3_time_numberRe.lastIndex = 0;
2692     var n = d3_time_numberRe.exec(string.substring(i, i + 2));
2693     return n ? (date.d = +n[0], i + n[0].length) : -1;
2694   }
2695   function d3_time_parseDayOfYear(date, string, i) {
2696     d3_time_numberRe.lastIndex = 0;
2697     var n = d3_time_numberRe.exec(string.substring(i, i + 3));
2698     return n ? (date.j = +n[0], i + n[0].length) : -1;
2699   }
2700   function d3_time_parseHour24(date, string, i) {
2701     d3_time_numberRe.lastIndex = 0;
2702     var n = d3_time_numberRe.exec(string.substring(i, i + 2));
2703     return n ? (date.H = +n[0], i + n[0].length) : -1;
2704   }
2705   function d3_time_parseMinutes(date, string, i) {
2706     d3_time_numberRe.lastIndex = 0;
2707     var n = d3_time_numberRe.exec(string.substring(i, i + 2));
2708     return n ? (date.M = +n[0], i + n[0].length) : -1;
2709   }
2710   function d3_time_parseSeconds(date, string, i) {
2711     d3_time_numberRe.lastIndex = 0;
2712     var n = d3_time_numberRe.exec(string.substring(i, i + 2));
2713     return n ? (date.S = +n[0], i + n[0].length) : -1;
2714   }
2715   function d3_time_parseMilliseconds(date, string, i) {
2716     d3_time_numberRe.lastIndex = 0;
2717     var n = d3_time_numberRe.exec(string.substring(i, i + 3));
2718     return n ? (date.L = +n[0], i + n[0].length) : -1;
2719   }
2720   function d3_time_zone(d) {
2721     var z = d.getTimezoneOffset(), zs = z > 0 ? "-" : "+", zh = ~~(abs(z) / 60), zm = abs(z) % 60;
2722     return zs + d3_time_formatPad(zh, "0", 2) + d3_time_formatPad(zm, "0", 2);
2723   }
2724   function d3_time_parseLiteralPercent(date, string, i) {
2725     d3_time_percentRe.lastIndex = 0;
2726     var n = d3_time_percentRe.exec(string.substring(i, i + 1));
2727     return n ? i + n[0].length : -1;
2728   }
2729   function d3_time_formatMulti(formats) {
2730     var n = formats.length, i = -1;
2731     while (++i < n) formats[i][0] = this(formats[i][0]);
2732     return function(date) {
2733       var i = 0, f = formats[i];
2734       while (!f[1](date)) f = formats[++i];
2735       return f[0](date);
2736     };
2737   }
2738   d3.locale = function(locale) {
2739     return {
2740       numberFormat: d3_locale_numberFormat(locale),
2741       timeFormat: d3_locale_timeFormat(locale)
2742     };
2743   };
2744   var d3_locale_enUS = d3.locale({
2745     decimal: ".",
2746     thousands: ",",
2747     grouping: [ 3 ],
2748     currency: [ "$", "" ],
2749     dateTime: "%a %b %e %X %Y",
2750     date: "%m/%d/%Y",
2751     time: "%H:%M:%S",
2752     periods: [ "AM", "PM" ],
2753     days: [ "Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday" ],
2754     shortDays: [ "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat" ],
2755     months: [ "January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December" ],
2756     shortMonths: [ "Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec" ]
2757   });
2758   d3.format = d3_locale_enUS.numberFormat;
2759   d3.geo = {};
2760   function d3_adder() {}
2761   d3_adder.prototype = {
2762     s: 0,
2763     t: 0,
2764     add: function(y) {
2765       d3_adderSum(y, this.t, d3_adderTemp);
2766       d3_adderSum(d3_adderTemp.s, this.s, this);
2767       if (this.s) this.t += d3_adderTemp.t; else this.s = d3_adderTemp.t;
2768     },
2769     reset: function() {
2770       this.s = this.t = 0;
2771     },
2772     valueOf: function() {
2773       return this.s;
2774     }
2775   };
2776   var d3_adderTemp = new d3_adder();
2777   function d3_adderSum(a, b, o) {
2778     var x = o.s = a + b, bv = x - a, av = x - bv;
2779     o.t = a - av + (b - bv);
2780   }
2781   d3.geo.stream = function(object, listener) {
2782     if (object && d3_geo_streamObjectType.hasOwnProperty(object.type)) {
2783       d3_geo_streamObjectType[object.type](object, listener);
2784     } else {
2785       d3_geo_streamGeometry(object, listener);
2786     }
2787   };
2788   function d3_geo_streamGeometry(geometry, listener) {
2789     if (geometry && d3_geo_streamGeometryType.hasOwnProperty(geometry.type)) {
2790       d3_geo_streamGeometryType[geometry.type](geometry, listener);
2791     }
2792   }
2793   var d3_geo_streamObjectType = {
2794     Feature: function(feature, listener) {
2795       d3_geo_streamGeometry(feature.geometry, listener);
2796     },
2797     FeatureCollection: function(object, listener) {
2798       var features = object.features, i = -1, n = features.length;
2799       while (++i < n) d3_geo_streamGeometry(features[i].geometry, listener);
2800     }
2801   };
2802   var d3_geo_streamGeometryType = {
2803     Sphere: function(object, listener) {
2804       listener.sphere();
2805     },
2806     Point: function(object, listener) {
2807       object = object.coordinates;
2808       listener.point(object[0], object[1], object[2]);
2809     },
2810     MultiPoint: function(object, listener) {
2811       var coordinates = object.coordinates, i = -1, n = coordinates.length;
2812       while (++i < n) object = coordinates[i], listener.point(object[0], object[1], object[2]);
2813     },
2814     LineString: function(object, listener) {
2815       d3_geo_streamLine(object.coordinates, listener, 0);
2816     },
2817     MultiLineString: function(object, listener) {
2818       var coordinates = object.coordinates, i = -1, n = coordinates.length;
2819       while (++i < n) d3_geo_streamLine(coordinates[i], listener, 0);
2820     },
2821     Polygon: function(object, listener) {
2822       d3_geo_streamPolygon(object.coordinates, listener);
2823     },
2824     MultiPolygon: function(object, listener) {
2825       var coordinates = object.coordinates, i = -1, n = coordinates.length;
2826       while (++i < n) d3_geo_streamPolygon(coordinates[i], listener);
2827     },
2828     GeometryCollection: function(object, listener) {
2829       var geometries = object.geometries, i = -1, n = geometries.length;
2830       while (++i < n) d3_geo_streamGeometry(geometries[i], listener);
2831     }
2832   };
2833   function d3_geo_streamLine(coordinates, listener, closed) {
2834     var i = -1, n = coordinates.length - closed, coordinate;
2835     listener.lineStart();
2836     while (++i < n) coordinate = coordinates[i], listener.point(coordinate[0], coordinate[1], coordinate[2]);
2837     listener.lineEnd();
2838   }
2839   function d3_geo_streamPolygon(coordinates, listener) {
2840     var i = -1, n = coordinates.length;
2841     listener.polygonStart();
2842     while (++i < n) d3_geo_streamLine(coordinates[i], listener, 1);
2843     listener.polygonEnd();
2844   }
2845   d3.geo.area = function(object) {
2846     d3_geo_areaSum = 0;
2847     d3.geo.stream(object, d3_geo_area);
2848     return d3_geo_areaSum;
2849   };
2850   var d3_geo_areaSum, d3_geo_areaRingSum = new d3_adder();
2851   var d3_geo_area = {
2852     sphere: function() {
2853       d3_geo_areaSum += 4 * π;
2854     },
2855     point: d3_noop,
2856     lineStart: d3_noop,
2857     lineEnd: d3_noop,
2858     polygonStart: function() {
2859       d3_geo_areaRingSum.reset();
2860       d3_geo_area.lineStart = d3_geo_areaRingStart;
2861     },
2862     polygonEnd: function() {
2863       var area = 2 * d3_geo_areaRingSum;
2864       d3_geo_areaSum += area < 0 ? 4 * π + area : area;
2865       d3_geo_area.lineStart = d3_geo_area.lineEnd = d3_geo_area.point = d3_noop;
2866     }
2867   };
2868   function d3_geo_areaRingStart() {
2869     var λ00, φ00, λ0, cosφ0, sinφ0;
2870     d3_geo_area.point = function(λ, φ) {
2871       d3_geo_area.point = nextPoint;
2872       λ0 = (λ00 = λ) * d3_radians, cosφ0 = Math.cos(φ = (φ00 = φ) * d3_radians / 2 + π / 4),
2873       sinφ0 = Math.sin(φ);
2874     };
2875     function nextPoint(λ, φ) {
2876       λ *= d3_radians;
2877       φ = φ * d3_radians / 2 + π / 4;
2878       var dλ = λ - λ0, sdλ = dλ >= 0 ? 1 : -1, adλ = sdλ * dλ, cosφ = Math.cos(φ), sinφ = Math.sin(φ), k = sinφ0 * sinφ, u = cosφ0 * cosφ + k * Math.cos(adλ), v = k * sdλ * Math.sin(adλ);
2879       d3_geo_areaRingSum.add(Math.atan2(v, u));
2880       λ0 = λ, cosφ0 = cosφ, sinφ0 = sinφ;
2881     }
2882     d3_geo_area.lineEnd = function() {
2883       nextPoint(λ00, φ00);
2884     };
2885   }
2886   function d3_geo_cartesian(spherical) {
2887     var λ = spherical[0], φ = spherical[1], cosφ = Math.cos(φ);
2888     return [ cosφ * Math.cos(λ), cosφ * Math.sin(λ), Math.sin(φ) ];
2889   }
2890   function d3_geo_cartesianDot(a, b) {
2891     return a[0] * b[0] + a[1] * b[1] + a[2] * b[2];
2892   }
2893   function d3_geo_cartesianCross(a, b) {
2894     return [ a[1] * b[2] - a[2] * b[1], a[2] * b[0] - a[0] * b[2], a[0] * b[1] - a[1] * b[0] ];
2895   }
2896   function d3_geo_cartesianAdd(a, b) {
2897     a[0] += b[0];
2898     a[1] += b[1];
2899     a[2] += b[2];
2900   }
2901   function d3_geo_cartesianScale(vector, k) {
2902     return [ vector[0] * k, vector[1] * k, vector[2] * k ];
2903   }
2904   function d3_geo_cartesianNormalize(d) {
2905     var l = Math.sqrt(d[0] * d[0] + d[1] * d[1] + d[2] * d[2]);
2906     d[0] /= l;
2907     d[1] /= l;
2908     d[2] /= l;
2909   }
2910   function d3_geo_spherical(cartesian) {
2911     return [ Math.atan2(cartesian[1], cartesian[0]), d3_asin(cartesian[2]) ];
2912   }
2913   function d3_geo_sphericalEqual(a, b) {
2914     return abs(a[0] - b[0]) < ε && abs(a[1] - b[1]) < ε;
2915   }
2916   d3.geo.bounds = function() {
2917     var λ0, φ0, λ1, φ1, λ_, λ__, φ__, p0, dλSum, ranges, range;
2918     var bound = {
2919       point: point,
2920       lineStart: lineStart,
2921       lineEnd: lineEnd,
2922       polygonStart: function() {
2923         bound.point = ringPoint;
2924         bound.lineStart = ringStart;
2925         bound.lineEnd = ringEnd;
2926         dλSum = 0;
2927         d3_geo_area.polygonStart();
2928       },
2929       polygonEnd: function() {
2930         d3_geo_area.polygonEnd();
2931         bound.point = point;
2932         bound.lineStart = lineStart;
2933         bound.lineEnd = lineEnd;
2934         if (d3_geo_areaRingSum < 0) λ0 = -(λ1 = 180), φ0 = -(φ1 = 90); else if (dλSum > ε) φ1 = 90; else if (dλSum < -ε) φ0 = -90;
2935         range[0] = λ0, range[1] = λ1;
2936       }
2937     };
2938     function point(λ, φ) {
2939       ranges.push(range = [ λ0 = λ, λ1 = λ ]);
2940       if (φ < φ0) φ0 = φ;
2941       if (φ > φ1) φ1 = φ;
2942     }
2943     function linePoint(λ, φ) {
2944       var p = d3_geo_cartesian([ λ * d3_radians, φ * d3_radians ]);
2945       if (p0) {
2946         var normal = d3_geo_cartesianCross(p0, p), equatorial = [ normal[1], -normal[0], 0 ], inflection = d3_geo_cartesianCross(equatorial, normal);
2947         d3_geo_cartesianNormalize(inflection);
2948         inflection = d3_geo_spherical(inflection);
2949         var dλ = λ - λ_, s = dλ > 0 ? 1 : -1, λi = inflection[0] * d3_degrees * s, antimeridian = abs(dλ) > 180;
2950         if (antimeridian ^ (s * λ_ < λi && λi < s * λ)) {
2951           var φi = inflection[1] * d3_degrees;
2952           if (φi > φ1) φ1 = φi;
2953         } else if (λi = (λi + 360) % 360 - 180, antimeridian ^ (s * λ_ < λi && λi < s * λ)) {
2954           var φi = -inflection[1] * d3_degrees;
2955           if (φi < φ0) φ0 = φi;
2956         } else {
2957           if (φ < φ0) φ0 = φ;
2958           if (φ > φ1) φ1 = φ;
2959         }
2960         if (antimeridian) {
2961           if (λ < λ_) {
2962             if (angle(λ0, λ) > angle(λ0, λ1)) λ1 = λ;
2963           } else {
2964             if (angle(λ, λ1) > angle(λ0, λ1)) λ0 = λ;
2965           }
2966         } else {
2967           if (λ1 >= λ0) {
2968             if (λ < λ0) λ0 = λ;
2969             if (λ > λ1) λ1 = λ;
2970           } else {
2971             if (λ > λ_) {
2972               if (angle(λ0, λ) > angle(λ0, λ1)) λ1 = λ;
2973             } else {
2974               if (angle(λ, λ1) > angle(λ0, λ1)) λ0 = λ;
2975             }
2976           }
2977         }
2978       } else {
2979         point(λ, φ);
2980       }
2981       p0 = p, λ_ = λ;
2982     }
2983     function lineStart() {
2984       bound.point = linePoint;
2985     }
2986     function lineEnd() {
2987       range[0] = λ0, range[1] = λ1;
2988       bound.point = point;
2989       p0 = null;
2990     }
2991     function ringPoint(λ, φ) {
2992       if (p0) {
2993         var dλ = λ - λ_;
2994         dλSum += abs(dλ) > 180 ? dλ + (dλ > 0 ? 360 : -360) : dλ;
2995       } else λ__ = λ, φ__ = φ;
2996       d3_geo_area.point(λ, φ);
2997       linePoint(λ, φ);
2998     }
2999     function ringStart() {
3000       d3_geo_area.lineStart();
3001     }
3002     function ringEnd() {
3003       ringPoint(λ__, φ__);
3004       d3_geo_area.lineEnd();
3005       if (abs(dλSum) > ε) λ0 = -(λ1 = 180);
3006       range[0] = λ0, range[1] = λ1;
3007       p0 = null;
3008     }
3009     function angle(λ0, λ1) {
3010       return (λ1 -= λ0) < 0 ? λ1 + 360 : λ1;
3011     }
3012     function compareRanges(a, b) {
3013       return a[0] - b[0];
3014     }
3015     function withinRange(x, range) {
3016       return range[0] <= range[1] ? range[0] <= x && x <= range[1] : x < range[0] || range[1] < x;
3017     }
3018     return function(feature) {
3019       φ1 = λ1 = -(λ0 = φ0 = Infinity);
3020       ranges = [];
3021       d3.geo.stream(feature, bound);
3022       var n = ranges.length;
3023       if (n) {
3024         ranges.sort(compareRanges);
3025         for (var i = 1, a = ranges[0], b, merged = [ a ]; i < n; ++i) {
3026           b = ranges[i];
3027           if (withinRange(b[0], a) || withinRange(b[1], a)) {
3028             if (angle(a[0], b[1]) > angle(a[0], a[1])) a[1] = b[1];
3029             if (angle(b[0], a[1]) > angle(a[0], a[1])) a[0] = b[0];
3030           } else {
3031             merged.push(a = b);
3032           }
3033         }
3034         var best = -Infinity, dλ;
3035         for (var n = merged.length - 1, i = 0, a = merged[n], b; i <= n; a = b, ++i) {
3036           b = merged[i];
3037           if ((dλ = angle(a[1], b[0])) > best) best = dλ, λ0 = b[0], λ1 = a[1];
3038         }
3039       }
3040       ranges = range = null;
3041       return λ0 === Infinity || φ0 === Infinity ? [ [ NaN, NaN ], [ NaN, NaN ] ] : [ [ λ0, φ0 ], [ λ1, φ1 ] ];
3042     };
3043   }();
3044   d3.geo.centroid = function(object) {
3045     d3_geo_centroidW0 = d3_geo_centroidW1 = d3_geo_centroidX0 = d3_geo_centroidY0 = d3_geo_centroidZ0 = d3_geo_centroidX1 = d3_geo_centroidY1 = d3_geo_centroidZ1 = d3_geo_centroidX2 = d3_geo_centroidY2 = d3_geo_centroidZ2 = 0;
3046     d3.geo.stream(object, d3_geo_centroid);
3047     var x = d3_geo_centroidX2, y = d3_geo_centroidY2, z = d3_geo_centroidZ2, m = x * x + y * y + z * z;
3048     if (m < ε2) {
3049       x = d3_geo_centroidX1, y = d3_geo_centroidY1, z = d3_geo_centroidZ1;
3050       if (d3_geo_centroidW1 < ε) x = d3_geo_centroidX0, y = d3_geo_centroidY0, z = d3_geo_centroidZ0;
3051       m = x * x + y * y + z * z;
3052       if (m < ε2) return [ NaN, NaN ];
3053     }
3054     return [ Math.atan2(y, x) * d3_degrees, d3_asin(z / Math.sqrt(m)) * d3_degrees ];
3055   };
3056   var d3_geo_centroidW0, d3_geo_centroidW1, d3_geo_centroidX0, d3_geo_centroidY0, d3_geo_centroidZ0, d3_geo_centroidX1, d3_geo_centroidY1, d3_geo_centroidZ1, d3_geo_centroidX2, d3_geo_centroidY2, d3_geo_centroidZ2;
3057   var d3_geo_centroid = {
3058     sphere: d3_noop,
3059     point: d3_geo_centroidPoint,
3060     lineStart: d3_geo_centroidLineStart,
3061     lineEnd: d3_geo_centroidLineEnd,
3062     polygonStart: function() {
3063       d3_geo_centroid.lineStart = d3_geo_centroidRingStart;
3064     },
3065     polygonEnd: function() {
3066       d3_geo_centroid.lineStart = d3_geo_centroidLineStart;
3067     }
3068   };
3069   function d3_geo_centroidPoint(λ, φ) {
3070     λ *= d3_radians;
3071     var cosφ = Math.cos(φ *= d3_radians);
3072     d3_geo_centroidPointXYZ(cosφ * Math.cos(λ), cosφ * Math.sin(λ), Math.sin(φ));
3073   }
3074   function d3_geo_centroidPointXYZ(x, y, z) {
3075     ++d3_geo_centroidW0;
3076     d3_geo_centroidX0 += (x - d3_geo_centroidX0) / d3_geo_centroidW0;
3077     d3_geo_centroidY0 += (y - d3_geo_centroidY0) / d3_geo_centroidW0;
3078     d3_geo_centroidZ0 += (z - d3_geo_centroidZ0) / d3_geo_centroidW0;
3079   }
3080   function d3_geo_centroidLineStart() {
3081     var x0, y0, z0;
3082     d3_geo_centroid.point = function(λ, φ) {
3083       λ *= d3_radians;
3084       var cosφ = Math.cos(φ *= d3_radians);
3085       x0 = cosφ * Math.cos(λ);
3086       y0 = cosφ * Math.sin(λ);
3087       z0 = Math.sin(φ);
3088       d3_geo_centroid.point = nextPoint;
3089       d3_geo_centroidPointXYZ(x0, y0, z0);
3090     };
3091     function nextPoint(λ, φ) {
3092       λ *= d3_radians;
3093       var cosφ = Math.cos(φ *= d3_radians), x = cosφ * Math.cos(λ), y = cosφ * Math.sin(λ), z = Math.sin(φ), w = Math.atan2(Math.sqrt((w = y0 * z - z0 * y) * w + (w = z0 * x - x0 * z) * w + (w = x0 * y - y0 * x) * w), x0 * x + y0 * y + z0 * z);
3094       d3_geo_centroidW1 += w;
3095       d3_geo_centroidX1 += w * (x0 + (x0 = x));
3096       d3_geo_centroidY1 += w * (y0 + (y0 = y));
3097       d3_geo_centroidZ1 += w * (z0 + (z0 = z));
3098       d3_geo_centroidPointXYZ(x0, y0, z0);
3099     }
3100   }
3101   function d3_geo_centroidLineEnd() {
3102     d3_geo_centroid.point = d3_geo_centroidPoint;
3103   }
3104   function d3_geo_centroidRingStart() {
3105     var λ00, φ00, x0, y0, z0;
3106     d3_geo_centroid.point = function(λ, φ) {
3107       λ00 = λ, φ00 = φ;
3108       d3_geo_centroid.point = nextPoint;
3109       λ *= d3_radians;
3110       var cosφ = Math.cos(φ *= d3_radians);
3111       x0 = cosφ * Math.cos(λ);
3112       y0 = cosφ * Math.sin(λ);
3113       z0 = Math.sin(φ);
3114       d3_geo_centroidPointXYZ(x0, y0, z0);
3115     };
3116     d3_geo_centroid.lineEnd = function() {
3117       nextPoint(λ00, φ00);
3118       d3_geo_centroid.lineEnd = d3_geo_centroidLineEnd;
3119       d3_geo_centroid.point = d3_geo_centroidPoint;
3120     };
3121     function nextPoint(λ, φ) {
3122       λ *= d3_radians;
3123       var cosφ = Math.cos(φ *= d3_radians), x = cosφ * Math.cos(λ), y = cosφ * Math.sin(λ), z = Math.sin(φ), cx = y0 * z - z0 * y, cy = z0 * x - x0 * z, cz = x0 * y - y0 * x, m = Math.sqrt(cx * cx + cy * cy + cz * cz), u = x0 * x + y0 * y + z0 * z, v = m && -d3_acos(u) / m, w = Math.atan2(m, u);
3124       d3_geo_centroidX2 += v * cx;
3125       d3_geo_centroidY2 += v * cy;
3126       d3_geo_centroidZ2 += v * cz;
3127       d3_geo_centroidW1 += w;
3128       d3_geo_centroidX1 += w * (x0 + (x0 = x));
3129       d3_geo_centroidY1 += w * (y0 + (y0 = y));
3130       d3_geo_centroidZ1 += w * (z0 + (z0 = z));
3131       d3_geo_centroidPointXYZ(x0, y0, z0);
3132     }
3133   }
3134   function d3_true() {
3135     return true;
3136   }
3137   function d3_geo_clipPolygon(segments, compare, clipStartInside, interpolate, listener) {
3138     var subject = [], clip = [];
3139     segments.forEach(function(segment) {
3140       if ((n = segment.length - 1) <= 0) return;
3141       var n, p0 = segment[0], p1 = segment[n];
3142       if (d3_geo_sphericalEqual(p0, p1)) {
3143         listener.lineStart();
3144         for (var i = 0; i < n; ++i) listener.point((p0 = segment[i])[0], p0[1]);
3145         listener.lineEnd();
3146         return;
3147       }
3148       var a = new d3_geo_clipPolygonIntersection(p0, segment, null, true), b = new d3_geo_clipPolygonIntersection(p0, null, a, false);
3149       a.o = b;
3150       subject.push(a);
3151       clip.push(b);
3152       a = new d3_geo_clipPolygonIntersection(p1, segment, null, false);
3153       b = new d3_geo_clipPolygonIntersection(p1, null, a, true);
3154       a.o = b;
3155       subject.push(a);
3156       clip.push(b);
3157     });
3158     clip.sort(compare);
3159     d3_geo_clipPolygonLinkCircular(subject);
3160     d3_geo_clipPolygonLinkCircular(clip);
3161     if (!subject.length) return;
3162     for (var i = 0, entry = clipStartInside, n = clip.length; i < n; ++i) {
3163       clip[i].e = entry = !entry;
3164     }
3165     var start = subject[0], points, point;
3166     while (1) {
3167       var current = start, isSubject = true;
3168       while (current.v) if ((current = current.n) === start) return;
3169       points = current.z;
3170       listener.lineStart();
3171       do {
3172         current.v = current.o.v = true;
3173         if (current.e) {
3174           if (isSubject) {
3175             for (var i = 0, n = points.length; i < n; ++i) listener.point((point = points[i])[0], point[1]);
3176           } else {
3177             interpolate(current.x, current.n.x, 1, listener);
3178           }
3179           current = current.n;
3180         } else {
3181           if (isSubject) {
3182             points = current.p.z;
3183             for (var i = points.length - 1; i >= 0; --i) listener.point((point = points[i])[0], point[1]);
3184           } else {
3185             interpolate(current.x, current.p.x, -1, listener);
3186           }
3187           current = current.p;
3188         }
3189         current = current.o;
3190         points = current.z;
3191         isSubject = !isSubject;
3192       } while (!current.v);
3193       listener.lineEnd();
3194     }
3195   }
3196   function d3_geo_clipPolygonLinkCircular(array) {
3197     if (!(n = array.length)) return;
3198     var n, i = 0, a = array[0], b;
3199     while (++i < n) {
3200       a.n = b = array[i];
3201       b.p = a;
3202       a = b;
3203     }
3204     a.n = b = array[0];
3205     b.p = a;
3206   }
3207   function d3_geo_clipPolygonIntersection(point, points, other, entry) {
3208     this.x = point;
3209     this.z = points;
3210     this.o = other;
3211     this.e = entry;
3212     this.v = false;
3213     this.n = this.p = null;
3214   }
3215   function d3_geo_clip(pointVisible, clipLine, interpolate, clipStart) {
3216     return function(rotate, listener) {
3217       var line = clipLine(listener), rotatedClipStart = rotate.invert(clipStart[0], clipStart[1]);
3218       var clip = {
3219         point: point,
3220         lineStart: lineStart,
3221         lineEnd: lineEnd,
3222         polygonStart: function() {
3223           clip.point = pointRing;
3224           clip.lineStart = ringStart;
3225           clip.lineEnd = ringEnd;
3226           segments = [];
3227           polygon = [];
3228           listener.polygonStart();
3229         },
3230         polygonEnd: function() {
3231           clip.point = point;
3232           clip.lineStart = lineStart;
3233           clip.lineEnd = lineEnd;
3234           segments = d3.merge(segments);
3235           var clipStartInside = d3_geo_pointInPolygon(rotatedClipStart, polygon);
3236           if (segments.length) {
3237             d3_geo_clipPolygon(segments, d3_geo_clipSort, clipStartInside, interpolate, listener);
3238           } else if (clipStartInside) {
3239             listener.lineStart();
3240             interpolate(null, null, 1, listener);
3241             listener.lineEnd();
3242           }
3243           listener.polygonEnd();
3244           segments = polygon = null;
3245         },
3246         sphere: function() {
3247           listener.polygonStart();
3248           listener.lineStart();
3249           interpolate(null, null, 1, listener);
3250           listener.lineEnd();
3251           listener.polygonEnd();
3252         }
3253       };
3254       function point(λ, φ) {
3255         var point = rotate(λ, φ);
3256         if (pointVisible(λ = point[0], φ = point[1])) listener.point(λ, φ);
3257       }
3258       function pointLine(λ, φ) {
3259         var point = rotate(λ, φ);
3260         line.point(point[0], point[1]);
3261       }
3262       function lineStart() {
3263         clip.point = pointLine;
3264         line.lineStart();
3265       }
3266       function lineEnd() {
3267         clip.point = point;
3268         line.lineEnd();
3269       }
3270       var segments;
3271       var buffer = d3_geo_clipBufferListener(), ringListener = clipLine(buffer), polygon, ring;
3272       function pointRing(λ, φ) {
3273         ring.push([ λ, φ ]);
3274         var point = rotate(λ, φ);
3275         ringListener.point(point[0], point[1]);
3276       }
3277       function ringStart() {
3278         ringListener.lineStart();
3279         ring = [];
3280       }
3281       function ringEnd() {
3282         pointRing(ring[0][0], ring[0][1]);
3283         ringListener.lineEnd();
3284         var clean = ringListener.clean(), ringSegments = buffer.buffer(), segment, n = ringSegments.length;
3285         ring.pop();
3286         polygon.push(ring);
3287         ring = null;
3288         if (!n) return;
3289         if (clean & 1) {
3290           segment = ringSegments[0];
3291           var n = segment.length - 1, i = -1, point;
3292           listener.lineStart();
3293           while (++i < n) listener.point((point = segment[i])[0], point[1]);
3294           listener.lineEnd();
3295           return;
3296         }
3297         if (n > 1 && clean & 2) ringSegments.push(ringSegments.pop().concat(ringSegments.shift()));
3298         segments.push(ringSegments.filter(d3_geo_clipSegmentLength1));
3299       }
3300       return clip;
3301     };
3302   }
3303   function d3_geo_clipSegmentLength1(segment) {
3304     return segment.length > 1;
3305   }
3306   function d3_geo_clipBufferListener() {
3307     var lines = [], line;
3308     return {
3309       lineStart: function() {
3310         lines.push(line = []);
3311       },
3312       point: function(λ, φ) {
3313         line.push([ λ, φ ]);
3314       },
3315       lineEnd: d3_noop,
3316       buffer: function() {
3317         var buffer = lines;
3318         lines = [];
3319         line = null;
3320         return buffer;
3321       },
3322       rejoin: function() {
3323         if (lines.length > 1) lines.push(lines.pop().concat(lines.shift()));
3324       }
3325     };
3326   }
3327   function d3_geo_clipSort(a, b) {
3328     return ((a = a.x)[0] < 0 ? a[1] - halfπ - ε : halfπ - a[1]) - ((b = b.x)[0] < 0 ? b[1] - halfπ - ε : halfπ - b[1]);
3329   }
3330   function d3_geo_pointInPolygon(point, polygon) {
3331     var meridian = point[0], parallel = point[1], meridianNormal = [ Math.sin(meridian), -Math.cos(meridian), 0 ], polarAngle = 0, winding = 0;
3332     d3_geo_areaRingSum.reset();
3333     for (var i = 0, n = polygon.length; i < n; ++i) {
3334       var ring = polygon[i], m = ring.length;
3335       if (!m) continue;
3336       var point0 = ring[0], λ0 = point0[0], φ0 = point0[1] / 2 + π / 4, sinφ0 = Math.sin(φ0), cosφ0 = Math.cos(φ0), j = 1;
3337       while (true) {
3338         if (j === m) j = 0;
3339         point = ring[j];
3340         var λ = point[0], φ = point[1] / 2 + π / 4, sinφ = Math.sin(φ), cosφ = Math.cos(φ), dλ = λ - λ0, sdλ = dλ >= 0 ? 1 : -1, adλ = sdλ * dλ, antimeridian = adλ > π, k = sinφ0 * sinφ;
3341         d3_geo_areaRingSum.add(Math.atan2(k * sdλ * Math.sin(adλ), cosφ0 * cosφ + k * Math.cos(adλ)));
3342         polarAngle += antimeridian ? dλ + sdλ * τ : dλ;
3343         if (antimeridian ^ λ0 >= meridian ^ λ >= meridian) {
3344           var arc = d3_geo_cartesianCross(d3_geo_cartesian(point0), d3_geo_cartesian(point));
3345           d3_geo_cartesianNormalize(arc);
3346           var intersection = d3_geo_cartesianCross(meridianNormal, arc);
3347           d3_geo_cartesianNormalize(intersection);
3348           var φarc = (antimeridian ^ dλ >= 0 ? -1 : 1) * d3_asin(intersection[2]);
3349           if (parallel > φarc || parallel === φarc && (arc[0] || arc[1])) {
3350             winding += antimeridian ^ dλ >= 0 ? 1 : -1;
3351           }
3352         }
3353         if (!j++) break;
3354         λ0 = λ, sinφ0 = sinφ, cosφ0 = cosφ, point0 = point;
3355       }
3356     }
3357     return (polarAngle < -ε || polarAngle < ε && d3_geo_areaRingSum < 0) ^ winding & 1;
3358   }
3359   var d3_geo_clipAntimeridian = d3_geo_clip(d3_true, d3_geo_clipAntimeridianLine, d3_geo_clipAntimeridianInterpolate, [ -π, -π / 2 ]);
3360   function d3_geo_clipAntimeridianLine(listener) {
3361     var λ0 = NaN, φ0 = NaN, sλ0 = NaN, clean;
3362     return {
3363       lineStart: function() {
3364         listener.lineStart();
3365         clean = 1;
3366       },
3367       point: function(λ1, φ1) {
3368         var sλ1 = λ1 > 0 ? π : -π, dλ = abs(λ1 - λ0);
3369         if (abs(dλ - π) < ε) {
3370           listener.point(λ0, φ0 = (φ0 + φ1) / 2 > 0 ? halfπ : -halfπ);
3371           listener.point(sλ0, φ0);
3372           listener.lineEnd();
3373           listener.lineStart();
3374           listener.point(sλ1, φ0);
3375           listener.point(λ1, φ0);
3376           clean = 0;
3377         } else if (sλ0 !== sλ1 && dλ >= π) {
3378           if (abs(λ0 - sλ0) < ε) λ0 -= sλ0 * ε;
3379           if (abs(λ1 - sλ1) < ε) λ1 -= sλ1 * ε;
3380           φ0 = d3_geo_clipAntimeridianIntersect(λ0, φ0, λ1, φ1);
3381           listener.point(sλ0, φ0);
3382           listener.lineEnd();
3383           listener.lineStart();
3384           listener.point(sλ1, φ0);
3385           clean = 0;
3386         }
3387         listener.point(λ0 = λ1, φ0 = φ1);
3388         sλ0 = sλ1;
3389       },
3390       lineEnd: function() {
3391         listener.lineEnd();
3392         λ0 = φ0 = NaN;
3393       },
3394       clean: function() {
3395         return 2 - clean;
3396       }
3397     };
3398   }
3399   function d3_geo_clipAntimeridianIntersect(λ0, φ0, λ1, φ1) {
3400     var cosφ0, cosφ1, sinλ0_λ1 = Math.sin(λ0 - λ1);
3401     return abs(sinλ0_λ1) > ε ? Math.atan((Math.sin(φ0) * (cosφ1 = Math.cos(φ1)) * Math.sin(λ1) - Math.sin(φ1) * (cosφ0 = Math.cos(φ0)) * Math.sin(λ0)) / (cosφ0 * cosφ1 * sinλ0_λ1)) : (φ0 + φ1) / 2;
3402   }
3403   function d3_geo_clipAntimeridianInterpolate(from, to, direction, listener) {
3404     var φ;
3405     if (from == null) {
3406       φ = direction * halfπ;
3407       listener.point(-π, φ);
3408       listener.point(0, φ);
3409       listener.point(π, φ);
3410       listener.point(π, 0);
3411       listener.point(π, -φ);
3412       listener.point(0, -φ);
3413       listener.point(-π, -φ);
3414       listener.point(-π, 0);
3415       listener.point(-π, φ);
3416     } else if (abs(from[0] - to[0]) > ε) {
3417       var s = from[0] < to[0] ? π : -π;
3418       φ = direction * s / 2;
3419       listener.point(-s, φ);
3420       listener.point(0, φ);
3421       listener.point(s, φ);
3422     } else {
3423       listener.point(to[0], to[1]);
3424     }
3425   }
3426   function d3_geo_clipCircle(radius) {
3427     var cr = Math.cos(radius), smallRadius = cr > 0, notHemisphere = abs(cr) > ε, interpolate = d3_geo_circleInterpolate(radius, 6 * d3_radians);
3428     return d3_geo_clip(visible, clipLine, interpolate, smallRadius ? [ 0, -radius ] : [ -π, radius - π ]);
3429     function visible(λ, φ) {
3430       return Math.cos(λ) * Math.cos(φ) > cr;
3431     }
3432     function clipLine(listener) {
3433       var point0, c0, v0, v00, clean;
3434       return {
3435         lineStart: function() {
3436           v00 = v0 = false;
3437           clean = 1;
3438         },
3439         point: function(λ, φ) {
3440           var point1 = [ λ, φ ], point2, v = visible(λ, φ), c = smallRadius ? v ? 0 : code(λ, φ) : v ? code(λ + (λ < 0 ? π : -π), φ) : 0;
3441           if (!point0 && (v00 = v0 = v)) listener.lineStart();
3442           if (v !== v0) {
3443             point2 = intersect(point0, point1);
3444             if (d3_geo_sphericalEqual(point0, point2) || d3_geo_sphericalEqual(point1, point2)) {
3445               point1[0] += ε;
3446               point1[1] += ε;
3447               v = visible(point1[0], point1[1]);
3448             }
3449           }
3450           if (v !== v0) {
3451             clean = 0;
3452             if (v) {
3453               listener.lineStart();
3454               point2 = intersect(point1, point0);
3455               listener.point(point2[0], point2[1]);
3456             } else {
3457               point2 = intersect(point0, point1);
3458               listener.point(point2[0], point2[1]);
3459               listener.lineEnd();
3460             }
3461             point0 = point2;
3462           } else if (notHemisphere && point0 && smallRadius ^ v) {
3463             var t;
3464             if (!(c & c0) && (t = intersect(point1, point0, true))) {
3465               clean = 0;
3466               if (smallRadius) {
3467                 listener.lineStart();
3468                 listener.point(t[0][0], t[0][1]);
3469                 listener.point(t[1][0], t[1][1]);
3470                 listener.lineEnd();
3471               } else {
3472                 listener.point(t[1][0], t[1][1]);
3473                 listener.lineEnd();
3474                 listener.lineStart();
3475                 listener.point(t[0][0], t[0][1]);
3476               }
3477             }
3478           }
3479           if (v && (!point0 || !d3_geo_sphericalEqual(point0, point1))) {
3480             listener.point(point1[0], point1[1]);
3481           }
3482           point0 = point1, v0 = v, c0 = c;
3483         },
3484         lineEnd: function() {
3485           if (v0) listener.lineEnd();
3486           point0 = null;
3487         },
3488         clean: function() {
3489           return clean | (v00 && v0) << 1;
3490         }
3491       };
3492     }
3493     function intersect(a, b, two) {
3494       var pa = d3_geo_cartesian(a), pb = d3_geo_cartesian(b);
3495       var n1 = [ 1, 0, 0 ], n2 = d3_geo_cartesianCross(pa, pb), n2n2 = d3_geo_cartesianDot(n2, n2), n1n2 = n2[0], determinant = n2n2 - n1n2 * n1n2;
3496       if (!determinant) return !two && a;
3497       var c1 = cr * n2n2 / determinant, c2 = -cr * n1n2 / determinant, n1xn2 = d3_geo_cartesianCross(n1, n2), A = d3_geo_cartesianScale(n1, c1), B = d3_geo_cartesianScale(n2, c2);
3498       d3_geo_cartesianAdd(A, B);
3499       var u = n1xn2, w = d3_geo_cartesianDot(A, u), uu = d3_geo_cartesianDot(u, u), t2 = w * w - uu * (d3_geo_cartesianDot(A, A) - 1);
3500       if (t2 < 0) return;
3501       var t = Math.sqrt(t2), q = d3_geo_cartesianScale(u, (-w - t) / uu);
3502       d3_geo_cartesianAdd(q, A);
3503       q = d3_geo_spherical(q);
3504       if (!two) return q;
3505       var λ0 = a[0], λ1 = b[0], φ0 = a[1], φ1 = b[1], z;
3506       if (λ1 < λ0) z = λ0, λ0 = λ1, λ1 = z;
3507       var δλ = λ1 - λ0, polar = abs(δλ - π) < ε, meridian = polar || δλ < ε;
3508       if (!polar && φ1 < φ0) z = φ0, φ0 = φ1, φ1 = z;
3509       if (meridian ? polar ? φ0 + φ1 > 0 ^ q[1] < (abs(q[0] - λ0) < ε ? φ0 : φ1) : φ0 <= q[1] && q[1] <= φ1 : δλ > π ^ (λ0 <= q[0] && q[0] <= λ1)) {
3510         var q1 = d3_geo_cartesianScale(u, (-w + t) / uu);
3511         d3_geo_cartesianAdd(q1, A);
3512         return [ q, d3_geo_spherical(q1) ];
3513       }
3514     }
3515     function code(λ, φ) {
3516       var r = smallRadius ? radius : π - radius, code = 0;
3517       if (λ < -r) code |= 1; else if (λ > r) code |= 2;
3518       if (φ < -r) code |= 4; else if (φ > r) code |= 8;
3519       return code;
3520     }
3521   }
3522   function d3_geom_clipLine(x0, y0, x1, y1) {
3523     return function(line) {
3524       var a = line.a, b = line.b, ax = a.x, ay = a.y, bx = b.x, by = b.y, t0 = 0, t1 = 1, dx = bx - ax, dy = by - ay, r;
3525       r = x0 - ax;
3526       if (!dx && r > 0) return;
3527       r /= dx;
3528       if (dx < 0) {
3529         if (r < t0) return;
3530         if (r < t1) t1 = r;
3531       } else if (dx > 0) {
3532         if (r > t1) return;
3533         if (r > t0) t0 = r;
3534       }
3535       r = x1 - ax;
3536       if (!dx && r < 0) return;
3537       r /= dx;
3538       if (dx < 0) {
3539         if (r > t1) return;
3540         if (r > t0) t0 = r;
3541       } else if (dx > 0) {
3542         if (r < t0) return;
3543         if (r < t1) t1 = r;
3544       }
3545       r = y0 - ay;
3546       if (!dy && r > 0) return;
3547       r /= dy;
3548       if (dy < 0) {
3549         if (r < t0) return;
3550         if (r < t1) t1 = r;
3551       } else if (dy > 0) {
3552         if (r > t1) return;
3553         if (r > t0) t0 = r;
3554       }
3555       r = y1 - ay;
3556       if (!dy && r < 0) return;
3557       r /= dy;
3558       if (dy < 0) {
3559         if (r > t1) return;
3560         if (r > t0) t0 = r;
3561       } else if (dy > 0) {
3562         if (r < t0) return;
3563         if (r < t1) t1 = r;
3564       }
3565       if (t0 > 0) line.a = {
3566         x: ax + t0 * dx,
3567         y: ay + t0 * dy
3568       };
3569       if (t1 < 1) line.b = {
3570         x: ax + t1 * dx,
3571         y: ay + t1 * dy
3572       };
3573       return line;
3574     };
3575   }
3576   var d3_geo_clipExtentMAX = 1e9;
3577   d3.geo.clipExtent = function() {
3578     var x0, y0, x1, y1, stream, clip, clipExtent = {
3579       stream: function(output) {
3580         if (stream) stream.valid = false;
3581         stream = clip(output);
3582         stream.valid = true;
3583         return stream;
3584       },
3585       extent: function(_) {
3586         if (!arguments.length) return [ [ x0, y0 ], [ x1, y1 ] ];
3587         clip = d3_geo_clipExtent(x0 = +_[0][0], y0 = +_[0][1], x1 = +_[1][0], y1 = +_[1][1]);
3588         if (stream) stream.valid = false, stream = null;
3589         return clipExtent;
3590       }
3591     };
3592     return clipExtent.extent([ [ 0, 0 ], [ 960, 500 ] ]);
3593   };
3594   function d3_geo_clipExtent(x0, y0, x1, y1) {
3595     return function(listener) {
3596       var listener_ = listener, bufferListener = d3_geo_clipBufferListener(), clipLine = d3_geom_clipLine(x0, y0, x1, y1), segments, polygon, ring;
3597       var clip = {
3598         point: point,
3599         lineStart: lineStart,
3600         lineEnd: lineEnd,
3601         polygonStart: function() {
3602           listener = bufferListener;
3603           segments = [];
3604           polygon = [];
3605           clean = true;
3606         },
3607         polygonEnd: function() {
3608           listener = listener_;
3609           segments = d3.merge(segments);
3610           var clipStartInside = insidePolygon([ x0, y1 ]), inside = clean && clipStartInside, visible = segments.length;
3611           if (inside || visible) {
3612             listener.polygonStart();
3613             if (inside) {
3614               listener.lineStart();
3615               interpolate(null, null, 1, listener);
3616               listener.lineEnd();
3617             }
3618             if (visible) {
3619               d3_geo_clipPolygon(segments, compare, clipStartInside, interpolate, listener);
3620             }
3621             listener.polygonEnd();
3622           }
3623           segments = polygon = ring = null;
3624         }
3625       };
3626       function insidePolygon(p) {
3627         var wn = 0, n = polygon.length, y = p[1];
3628         for (var i = 0; i < n; ++i) {
3629           for (var j = 1, v = polygon[i], m = v.length, a = v[0], b; j < m; ++j) {
3630             b = v[j];
3631             if (a[1] <= y) {
3632               if (b[1] > y && d3_cross2d(a, b, p) > 0) ++wn;
3633             } else {
3634               if (b[1] <= y && d3_cross2d(a, b, p) < 0) --wn;
3635             }
3636             a = b;
3637           }
3638         }
3639         return wn !== 0;
3640       }
3641       function interpolate(from, to, direction, listener) {
3642         var a = 0, a1 = 0;
3643         if (from == null || (a = corner(from, direction)) !== (a1 = corner(to, direction)) || comparePoints(from, to) < 0 ^ direction > 0) {
3644           do {
3645             listener.point(a === 0 || a === 3 ? x0 : x1, a > 1 ? y1 : y0);
3646           } while ((a = (a + direction + 4) % 4) !== a1);
3647         } else {
3648           listener.point(to[0], to[1]);
3649         }
3650       }
3651       function pointVisible(x, y) {
3652         return x0 <= x && x <= x1 && y0 <= y && y <= y1;
3653       }
3654       function point(x, y) {
3655         if (pointVisible(x, y)) listener.point(x, y);
3656       }
3657       var x__, y__, v__, x_, y_, v_, first, clean;
3658       function lineStart() {
3659         clip.point = linePoint;
3660         if (polygon) polygon.push(ring = []);
3661         first = true;
3662         v_ = false;
3663         x_ = y_ = NaN;
3664       }
3665       function lineEnd() {
3666         if (segments) {
3667           linePoint(x__, y__);
3668           if (v__ && v_) bufferListener.rejoin();
3669           segments.push(bufferListener.buffer());
3670         }
3671         clip.point = point;
3672         if (v_) listener.lineEnd();
3673       }
3674       function linePoint(x, y) {
3675         x = Math.max(-d3_geo_clipExtentMAX, Math.min(d3_geo_clipExtentMAX, x));
3676         y = Math.max(-d3_geo_clipExtentMAX, Math.min(d3_geo_clipExtentMAX, y));
3677         var v = pointVisible(x, y);
3678         if (polygon) ring.push([ x, y ]);
3679         if (first) {
3680           x__ = x, y__ = y, v__ = v;
3681           first = false;
3682           if (v) {
3683             listener.lineStart();
3684             listener.point(x, y);
3685           }
3686         } else {
3687           if (v && v_) listener.point(x, y); else {
3688             var l = {
3689               a: {
3690                 x: x_,
3691                 y: y_
3692               },
3693               b: {
3694                 x: x,
3695                 y: y
3696               }
3697             };
3698             if (clipLine(l)) {
3699               if (!v_) {
3700                 listener.lineStart();
3701                 listener.point(l.a.x, l.a.y);
3702               }
3703               listener.point(l.b.x, l.b.y);
3704               if (!v) listener.lineEnd();
3705               clean = false;
3706             } else if (v) {
3707               listener.lineStart();
3708               listener.point(x, y);
3709               clean = false;
3710             }
3711           }
3712         }
3713         x_ = x, y_ = y, v_ = v;
3714       }
3715       return clip;
3716     };
3717     function corner(p, direction) {
3718       return abs(p[0] - x0) < ε ? direction > 0 ? 0 : 3 : abs(p[0] - x1) < ε ? direction > 0 ? 2 : 1 : abs(p[1] - y0) < ε ? direction > 0 ? 1 : 0 : direction > 0 ? 3 : 2;
3719     }
3720     function compare(a, b) {
3721       return comparePoints(a.x, b.x);
3722     }
3723     function comparePoints(a, b) {
3724       var ca = corner(a, 1), cb = corner(b, 1);
3725       return ca !== cb ? ca - cb : ca === 0 ? b[1] - a[1] : ca === 1 ? a[0] - b[0] : ca === 2 ? a[1] - b[1] : b[0] - a[0];
3726     }
3727   }
3728   function d3_geo_compose(a, b) {
3729     function compose(x, y) {
3730       return x = a(x, y), b(x[0], x[1]);
3731     }
3732     if (a.invert && b.invert) compose.invert = function(x, y) {
3733       return x = b.invert(x, y), x && a.invert(x[0], x[1]);
3734     };
3735     return compose;
3736   }
3737   function d3_geo_conic(projectAt) {
3738     var φ0 = 0, φ1 = π / 3, m = d3_geo_projectionMutator(projectAt), p = m(φ0, φ1);
3739     p.parallels = function(_) {
3740       if (!arguments.length) return [ φ0 / π * 180, φ1 / π * 180 ];
3741       return m(φ0 = _[0] * π / 180, φ1 = _[1] * π / 180);
3742     };
3743     return p;
3744   }
3745   function d3_geo_conicEqualArea(φ0, φ1) {
3746     var sinφ0 = Math.sin(φ0), n = (sinφ0 + Math.sin(φ1)) / 2, C = 1 + sinφ0 * (2 * n - sinφ0), ρ0 = Math.sqrt(C) / n;
3747     function forward(λ, φ) {
3748       var ρ = Math.sqrt(C - 2 * n * Math.sin(φ)) / n;
3749       return [ ρ * Math.sin(λ *= n), ρ0 - ρ * Math.cos(λ) ];
3750     }
3751     forward.invert = function(x, y) {
3752       var ρ0_y = ρ0 - y;
3753       return [ Math.atan2(x, ρ0_y) / n, d3_asin((C - (x * x + ρ0_y * ρ0_y) * n * n) / (2 * n)) ];
3754     };
3755     return forward;
3756   }
3757   (d3.geo.conicEqualArea = function() {
3758     return d3_geo_conic(d3_geo_conicEqualArea);
3759   }).raw = d3_geo_conicEqualArea;
3760   d3.geo.albers = function() {
3761     return d3.geo.conicEqualArea().rotate([ 96, 0 ]).center([ -.6, 38.7 ]).parallels([ 29.5, 45.5 ]).scale(1070);
3762   };
3763   d3.geo.albersUsa = function() {
3764     var lower48 = d3.geo.albers();
3765     var alaska = d3.geo.conicEqualArea().rotate([ 154, 0 ]).center([ -2, 58.5 ]).parallels([ 55, 65 ]);
3766     var hawaii = d3.geo.conicEqualArea().rotate([ 157, 0 ]).center([ -3, 19.9 ]).parallels([ 8, 18 ]);
3767     var point, pointStream = {
3768       point: function(x, y) {
3769         point = [ x, y ];
3770       }
3771     }, lower48Point, alaskaPoint, hawaiiPoint;
3772     function albersUsa(coordinates) {
3773       var x = coordinates[0], y = coordinates[1];
3774       point = null;
3775       (lower48Point(x, y), point) || (alaskaPoint(x, y), point) || hawaiiPoint(x, y);
3776       return point;
3777     }
3778     albersUsa.invert = function(coordinates) {
3779       var k = lower48.scale(), t = lower48.translate(), x = (coordinates[0] - t[0]) / k, y = (coordinates[1] - t[1]) / k;
3780       return (y >= .12 && y < .234 && x >= -.425 && x < -.214 ? alaska : y >= .166 && y < .234 && x >= -.214 && x < -.115 ? hawaii : lower48).invert(coordinates);
3781     };
3782     albersUsa.stream = function(stream) {
3783       var lower48Stream = lower48.stream(stream), alaskaStream = alaska.stream(stream), hawaiiStream = hawaii.stream(stream);
3784       return {
3785         point: function(x, y) {
3786           lower48Stream.point(x, y);
3787           alaskaStream.point(x, y);
3788           hawaiiStream.point(x, y);
3789         },
3790         sphere: function() {
3791           lower48Stream.sphere();
3792           alaskaStream.sphere();
3793           hawaiiStream.sphere();
3794         },
3795         lineStart: function() {
3796           lower48Stream.lineStart();
3797           alaskaStream.lineStart();
3798           hawaiiStream.lineStart();
3799         },
3800         lineEnd: function() {
3801           lower48Stream.lineEnd();
3802           alaskaStream.lineEnd();
3803           hawaiiStream.lineEnd();
3804         },
3805         polygonStart: function() {
3806           lower48Stream.polygonStart();
3807           alaskaStream.polygonStart();
3808           hawaiiStream.polygonStart();
3809         },
3810         polygonEnd: function() {
3811           lower48Stream.polygonEnd();
3812           alaskaStream.polygonEnd();
3813           hawaiiStream.polygonEnd();
3814         }
3815       };
3816     };
3817     albersUsa.precision = function(_) {
3818       if (!arguments.length) return lower48.precision();
3819       lower48.precision(_);
3820       alaska.precision(_);
3821       hawaii.precision(_);
3822       return albersUsa;
3823     };
3824     albersUsa.scale = function(_) {
3825       if (!arguments.length) return lower48.scale();
3826       lower48.scale(_);
3827       alaska.scale(_ * .35);
3828       hawaii.scale(_);
3829       return albersUsa.translate(lower48.translate());
3830     };
3831     albersUsa.translate = function(_) {
3832       if (!arguments.length) return lower48.translate();
3833       var k = lower48.scale(), x = +_[0], y = +_[1];
3834       lower48Point = lower48.translate(_).clipExtent([ [ x - .455 * k, y - .238 * k ], [ x + .455 * k, y + .238 * k ] ]).stream(pointStream).point;
3835       alaskaPoint = alaska.translate([ x - .307 * k, y + .201 * k ]).clipExtent([ [ x - .425 * k + ε, y + .12 * k + ε ], [ x - .214 * k - ε, y + .234 * k - ε ] ]).stream(pointStream).point;
3836       hawaiiPoint = hawaii.translate([ x - .205 * k, y + .212 * k ]).clipExtent([ [ x - .214 * k + ε, y + .166 * k + ε ], [ x - .115 * k - ε, y + .234 * k - ε ] ]).stream(pointStream).point;
3837       return albersUsa;
3838     };
3839     return albersUsa.scale(1070);
3840   };
3841   var d3_geo_pathAreaSum, d3_geo_pathAreaPolygon, d3_geo_pathArea = {
3842     point: d3_noop,
3843     lineStart: d3_noop,
3844     lineEnd: d3_noop,
3845     polygonStart: function() {
3846       d3_geo_pathAreaPolygon = 0;
3847       d3_geo_pathArea.lineStart = d3_geo_pathAreaRingStart;
3848     },
3849     polygonEnd: function() {
3850       d3_geo_pathArea.lineStart = d3_geo_pathArea.lineEnd = d3_geo_pathArea.point = d3_noop;
3851       d3_geo_pathAreaSum += abs(d3_geo_pathAreaPolygon / 2);
3852     }
3853   };
3854   function d3_geo_pathAreaRingStart() {
3855     var x00, y00, x0, y0;
3856     d3_geo_pathArea.point = function(x, y) {
3857       d3_geo_pathArea.point = nextPoint;
3858       x00 = x0 = x, y00 = y0 = y;
3859     };
3860     function nextPoint(x, y) {
3861       d3_geo_pathAreaPolygon += y0 * x - x0 * y;
3862       x0 = x, y0 = y;
3863     }
3864     d3_geo_pathArea.lineEnd = function() {
3865       nextPoint(x00, y00);
3866     };
3867   }
3868   var d3_geo_pathBoundsX0, d3_geo_pathBoundsY0, d3_geo_pathBoundsX1, d3_geo_pathBoundsY1;
3869   var d3_geo_pathBounds = {
3870     point: d3_geo_pathBoundsPoint,
3871     lineStart: d3_noop,
3872     lineEnd: d3_noop,
3873     polygonStart: d3_noop,
3874     polygonEnd: d3_noop
3875   };
3876   function d3_geo_pathBoundsPoint(x, y) {
3877     if (x < d3_geo_pathBoundsX0) d3_geo_pathBoundsX0 = x;
3878     if (x > d3_geo_pathBoundsX1) d3_geo_pathBoundsX1 = x;
3879     if (y < d3_geo_pathBoundsY0) d3_geo_pathBoundsY0 = y;
3880     if (y > d3_geo_pathBoundsY1) d3_geo_pathBoundsY1 = y;
3881   }
3882   function d3_geo_pathBuffer() {
3883     var pointCircle = d3_geo_pathBufferCircle(4.5), buffer = [];
3884     var stream = {
3885       point: point,
3886       lineStart: function() {
3887         stream.point = pointLineStart;
3888       },
3889       lineEnd: lineEnd,
3890       polygonStart: function() {
3891         stream.lineEnd = lineEndPolygon;
3892       },
3893       polygonEnd: function() {
3894         stream.lineEnd = lineEnd;
3895         stream.point = point;
3896       },
3897       pointRadius: function(_) {
3898         pointCircle = d3_geo_pathBufferCircle(_);
3899         return stream;
3900       },
3901       result: function() {
3902         if (buffer.length) {
3903           var result = buffer.join("");
3904           buffer = [];
3905           return result;
3906         }
3907       }
3908     };
3909     function point(x, y) {
3910       buffer.push("M", x, ",", y, pointCircle);
3911     }
3912     function pointLineStart(x, y) {
3913       buffer.push("M", x, ",", y);
3914       stream.point = pointLine;
3915     }
3916     function pointLine(x, y) {
3917       buffer.push("L", x, ",", y);
3918     }
3919     function lineEnd() {
3920       stream.point = point;
3921     }
3922     function lineEndPolygon() {
3923       buffer.push("Z");
3924     }
3925     return stream;
3926   }
3927   function d3_geo_pathBufferCircle(radius) {
3928     return "m0," + radius + "a" + radius + "," + radius + " 0 1,1 0," + -2 * radius + "a" + radius + "," + radius + " 0 1,1 0," + 2 * radius + "z";
3929   }
3930   var d3_geo_pathCentroid = {
3931     point: d3_geo_pathCentroidPoint,
3932     lineStart: d3_geo_pathCentroidLineStart,
3933     lineEnd: d3_geo_pathCentroidLineEnd,
3934     polygonStart: function() {
3935       d3_geo_pathCentroid.lineStart = d3_geo_pathCentroidRingStart;
3936     },
3937     polygonEnd: function() {
3938       d3_geo_pathCentroid.point = d3_geo_pathCentroidPoint;
3939       d3_geo_pathCentroid.lineStart = d3_geo_pathCentroidLineStart;
3940       d3_geo_pathCentroid.lineEnd = d3_geo_pathCentroidLineEnd;
3941     }
3942   };
3943   function d3_geo_pathCentroidPoint(x, y) {
3944     d3_geo_centroidX0 += x;
3945     d3_geo_centroidY0 += y;
3946     ++d3_geo_centroidZ0;
3947   }
3948   function d3_geo_pathCentroidLineStart() {
3949     var x0, y0;
3950     d3_geo_pathCentroid.point = function(x, y) {
3951       d3_geo_pathCentroid.point = nextPoint;
3952       d3_geo_pathCentroidPoint(x0 = x, y0 = y);
3953     };
3954     function nextPoint(x, y) {
3955       var dx = x - x0, dy = y - y0, z = Math.sqrt(dx * dx + dy * dy);
3956       d3_geo_centroidX1 += z * (x0 + x) / 2;
3957       d3_geo_centroidY1 += z * (y0 + y) / 2;
3958       d3_geo_centroidZ1 += z;
3959       d3_geo_pathCentroidPoint(x0 = x, y0 = y);
3960     }
3961   }
3962   function d3_geo_pathCentroidLineEnd() {
3963     d3_geo_pathCentroid.point = d3_geo_pathCentroidPoint;
3964   }
3965   function d3_geo_pathCentroidRingStart() {
3966     var x00, y00, x0, y0;
3967     d3_geo_pathCentroid.point = function(x, y) {
3968       d3_geo_pathCentroid.point = nextPoint;
3969       d3_geo_pathCentroidPoint(x00 = x0 = x, y00 = y0 = y);
3970     };
3971     function nextPoint(x, y) {
3972       var dx = x - x0, dy = y - y0, z = Math.sqrt(dx * dx + dy * dy);
3973       d3_geo_centroidX1 += z * (x0 + x) / 2;
3974       d3_geo_centroidY1 += z * (y0 + y) / 2;
3975       d3_geo_centroidZ1 += z;
3976       z = y0 * x - x0 * y;
3977       d3_geo_centroidX2 += z * (x0 + x);
3978       d3_geo_centroidY2 += z * (y0 + y);
3979       d3_geo_centroidZ2 += z * 3;
3980       d3_geo_pathCentroidPoint(x0 = x, y0 = y);
3981     }
3982     d3_geo_pathCentroid.lineEnd = function() {
3983       nextPoint(x00, y00);
3984     };
3985   }
3986   function d3_geo_pathContext(context) {
3987     var pointRadius = 4.5;
3988     var stream = {
3989       point: point,
3990       lineStart: function() {
3991         stream.point = pointLineStart;
3992       },
3993       lineEnd: lineEnd,
3994       polygonStart: function() {
3995         stream.lineEnd = lineEndPolygon;
3996       },
3997       polygonEnd: function() {
3998         stream.lineEnd = lineEnd;
3999         stream.point = point;
4000       },
4001       pointRadius: function(_) {
4002         pointRadius = _;
4003         return stream;
4004       },
4005       result: d3_noop
4006     };
4007     function point(x, y) {
4008       context.moveTo(x, y);
4009       context.arc(x, y, pointRadius, 0, τ);
4010     }
4011     function pointLineStart(x, y) {
4012       context.moveTo(x, y);
4013       stream.point = pointLine;
4014     }
4015     function pointLine(x, y) {
4016       context.lineTo(x, y);
4017     }
4018     function lineEnd() {
4019       stream.point = point;
4020     }
4021     function lineEndPolygon() {
4022       context.closePath();
4023     }
4024     return stream;
4025   }
4026   function d3_geo_resample(project) {
4027     var δ2 = .5, cosMinDistance = Math.cos(30 * d3_radians), maxDepth = 16;
4028     function resample(stream) {
4029       return (maxDepth ? resampleRecursive : resampleNone)(stream);
4030     }
4031     function resampleNone(stream) {
4032       return d3_geo_transformPoint(stream, function(x, y) {
4033         x = project(x, y);
4034         stream.point(x[0], x[1]);
4035       });
4036     }
4037     function resampleRecursive(stream) {
4038       var λ00, φ00, x00, y00, a00, b00, c00, λ0, x0, y0, a0, b0, c0;
4039       var resample = {
4040         point: point,
4041         lineStart: lineStart,
4042         lineEnd: lineEnd,
4043         polygonStart: function() {
4044           stream.polygonStart();
4045           resample.lineStart = ringStart;
4046         },
4047         polygonEnd: function() {
4048           stream.polygonEnd();
4049           resample.lineStart = lineStart;
4050         }
4051       };
4052       function point(x, y) {
4053         x = project(x, y);
4054         stream.point(x[0], x[1]);
4055       }
4056       function lineStart() {
4057         x0 = NaN;
4058         resample.point = linePoint;
4059         stream.lineStart();
4060       }
4061       function linePoint(λ, φ) {
4062         var c = d3_geo_cartesian([ λ, φ ]), p = project(λ, φ);
4063         resampleLineTo(x0, y0, λ0, a0, b0, c0, x0 = p[0], y0 = p[1], λ0 = λ, a0 = c[0], b0 = c[1], c0 = c[2], maxDepth, stream);
4064         stream.point(x0, y0);
4065       }
4066       function lineEnd() {
4067         resample.point = point;
4068         stream.lineEnd();
4069       }
4070       function ringStart() {
4071         lineStart();
4072         resample.point = ringPoint;
4073         resample.lineEnd = ringEnd;
4074       }
4075       function ringPoint(λ, φ) {
4076         linePoint(λ00 = λ, φ00 = φ), x00 = x0, y00 = y0, a00 = a0, b00 = b0, c00 = c0;
4077         resample.point = linePoint;
4078       }
4079       function ringEnd() {
4080         resampleLineTo(x0, y0, λ0, a0, b0, c0, x00, y00, λ00, a00, b00, c00, maxDepth, stream);
4081         resample.lineEnd = lineEnd;
4082         lineEnd();
4083       }
4084       return resample;
4085     }
4086     function resampleLineTo(x0, y0, λ0, a0, b0, c0, x1, y1, λ1, a1, b1, c1, depth, stream) {
4087       var dx = x1 - x0, dy = y1 - y0, d2 = dx * dx + dy * dy;
4088       if (d2 > 4 * δ2 && depth--) {
4089         var a = a0 + a1, b = b0 + b1, c = c0 + c1, m = Math.sqrt(a * a + b * b + c * c), φ2 = Math.asin(c /= m), λ2 = abs(abs(c) - 1) < ε || abs(λ0 - λ1) < ε ? (λ0 + λ1) / 2 : Math.atan2(b, a), p = project(λ2, φ2), x2 = p[0], y2 = p[1], dx2 = x2 - x0, dy2 = y2 - y0, dz = dy * dx2 - dx * dy2;
4090         if (dz * dz / d2 > δ2 || abs((dx * dx2 + dy * dy2) / d2 - .5) > .3 || a0 * a1 + b0 * b1 + c0 * c1 < cosMinDistance) {
4091           resampleLineTo(x0, y0, λ0, a0, b0, c0, x2, y2, λ2, a /= m, b /= m, c, depth, stream);
4092           stream.point(x2, y2);
4093           resampleLineTo(x2, y2, λ2, a, b, c, x1, y1, λ1, a1, b1, c1, depth, stream);
4094         }
4095       }
4096     }
4097     resample.precision = function(_) {
4098       if (!arguments.length) return Math.sqrt(δ2);
4099       maxDepth = (δ2 = _ * _) > 0 && 16;
4100       return resample;
4101     };
4102     return resample;
4103   }
4104   d3.geo.path = function() {
4105     var pointRadius = 4.5, projection, context, projectStream, contextStream, cacheStream;
4106     function path(object) {
4107       if (object) {
4108         if (typeof pointRadius === "function") contextStream.pointRadius(+pointRadius.apply(this, arguments));
4109         if (!cacheStream || !cacheStream.valid) cacheStream = projectStream(contextStream);
4110         d3.geo.stream(object, cacheStream);
4111       }
4112       return contextStream.result();
4113     }
4114     path.area = function(object) {
4115       d3_geo_pathAreaSum = 0;
4116       d3.geo.stream(object, projectStream(d3_geo_pathArea));
4117       return d3_geo_pathAreaSum;
4118     };
4119     path.centroid = function(object) {
4120       d3_geo_centroidX0 = d3_geo_centroidY0 = d3_geo_centroidZ0 = d3_geo_centroidX1 = d3_geo_centroidY1 = d3_geo_centroidZ1 = d3_geo_centroidX2 = d3_geo_centroidY2 = d3_geo_centroidZ2 = 0;
4121       d3.geo.stream(object, projectStream(d3_geo_pathCentroid));
4122       return d3_geo_centroidZ2 ? [ d3_geo_centroidX2 / d3_geo_centroidZ2, d3_geo_centroidY2 / d3_geo_centroidZ2 ] : d3_geo_centroidZ1 ? [ d3_geo_centroidX1 / d3_geo_centroidZ1, d3_geo_centroidY1 / d3_geo_centroidZ1 ] : d3_geo_centroidZ0 ? [ d3_geo_centroidX0 / d3_geo_centroidZ0, d3_geo_centroidY0 / d3_geo_centroidZ0 ] : [ NaN, NaN ];
4123     };
4124     path.bounds = function(object) {
4125       d3_geo_pathBoundsX1 = d3_geo_pathBoundsY1 = -(d3_geo_pathBoundsX0 = d3_geo_pathBoundsY0 = Infinity);
4126       d3.geo.stream(object, projectStream(d3_geo_pathBounds));
4127       return [ [ d3_geo_pathBoundsX0, d3_geo_pathBoundsY0 ], [ d3_geo_pathBoundsX1, d3_geo_pathBoundsY1 ] ];
4128     };
4129     path.projection = function(_) {
4130       if (!arguments.length) return projection;
4131       projectStream = (projection = _) ? _.stream || d3_geo_pathProjectStream(_) : d3_identity;
4132       return reset();
4133     };
4134     path.context = function(_) {
4135       if (!arguments.length) return context;
4136       contextStream = (context = _) == null ? new d3_geo_pathBuffer() : new d3_geo_pathContext(_);
4137       if (typeof pointRadius !== "function") contextStream.pointRadius(pointRadius);
4138       return reset();
4139     };
4140     path.pointRadius = function(_) {
4141       if (!arguments.length) return pointRadius;
4142       pointRadius = typeof _ === "function" ? _ : (contextStream.pointRadius(+_), +_);
4143       return path;
4144     };
4145     function reset() {
4146       cacheStream = null;
4147       return path;
4148     }
4149     return path.projection(d3.geo.albersUsa()).context(null);
4150   };
4151   function d3_geo_pathProjectStream(project) {
4152     var resample = d3_geo_resample(function(x, y) {
4153       return project([ x * d3_degrees, y * d3_degrees ]);
4154     });
4155     return function(stream) {
4156       return d3_geo_projectionRadians(resample(stream));
4157     };
4158   }
4159   d3.geo.transform = function(methods) {
4160     return {
4161       stream: function(stream) {
4162         var transform = new d3_geo_transform(stream);
4163         for (var k in methods) transform[k] = methods[k];
4164         return transform;
4165       }
4166     };
4167   };
4168   function d3_geo_transform(stream) {
4169     this.stream = stream;
4170   }
4171   d3_geo_transform.prototype = {
4172     point: function(x, y) {
4173       this.stream.point(x, y);
4174     },
4175     sphere: function() {
4176       this.stream.sphere();
4177     },
4178     lineStart: function() {
4179       this.stream.lineStart();
4180     },
4181     lineEnd: function() {
4182       this.stream.lineEnd();
4183     },
4184     polygonStart: function() {
4185       this.stream.polygonStart();
4186     },
4187     polygonEnd: function() {
4188       this.stream.polygonEnd();
4189     }
4190   };
4191   function d3_geo_transformPoint(stream, point) {
4192     return {
4193       point: point,
4194       sphere: function() {
4195         stream.sphere();
4196       },
4197       lineStart: function() {
4198         stream.lineStart();
4199       },
4200       lineEnd: function() {
4201         stream.lineEnd();
4202       },
4203       polygonStart: function() {
4204         stream.polygonStart();
4205       },
4206       polygonEnd: function() {
4207         stream.polygonEnd();
4208       }
4209     };
4210   }
4211   d3.geo.projection = d3_geo_projection;
4212   d3.geo.projectionMutator = d3_geo_projectionMutator;
4213   function d3_geo_projection(project) {
4214     return d3_geo_projectionMutator(function() {
4215       return project;
4216     })();
4217   }
4218   function d3_geo_projectionMutator(projectAt) {
4219     var project, rotate, projectRotate, projectResample = d3_geo_resample(function(x, y) {
4220       x = project(x, y);
4221       return [ x[0] * k + δx, δy - x[1] * k ];
4222     }), k = 150, x = 480, y = 250, λ = 0, φ = 0, δλ = 0, δφ = 0, δγ = 0, δx, δy, preclip = d3_geo_clipAntimeridian, postclip = d3_identity, clipAngle = null, clipExtent = null, stream;
4223     function projection(point) {
4224       point = projectRotate(point[0] * d3_radians, point[1] * d3_radians);
4225       return [ point[0] * k + δx, δy - point[1] * k ];
4226     }
4227     function invert(point) {
4228       point = projectRotate.invert((point[0] - δx) / k, (δy - point[1]) / k);
4229       return point && [ point[0] * d3_degrees, point[1] * d3_degrees ];
4230     }
4231     projection.stream = function(output) {
4232       if (stream) stream.valid = false;
4233       stream = d3_geo_projectionRadians(preclip(rotate, projectResample(postclip(output))));
4234       stream.valid = true;
4235       return stream;
4236     };
4237     projection.clipAngle = function(_) {
4238       if (!arguments.length) return clipAngle;
4239       preclip = _ == null ? (clipAngle = _, d3_geo_clipAntimeridian) : d3_geo_clipCircle((clipAngle = +_) * d3_radians);
4240       return invalidate();
4241     };
4242     projection.clipExtent = function(_) {
4243       if (!arguments.length) return clipExtent;
4244       clipExtent = _;
4245       postclip = _ ? d3_geo_clipExtent(_[0][0], _[0][1], _[1][0], _[1][1]) : d3_identity;
4246       return invalidate();
4247     };
4248     projection.scale = function(_) {
4249       if (!arguments.length) return k;
4250       k = +_;
4251       return reset();
4252     };
4253     projection.translate = function(_) {
4254       if (!arguments.length) return [ x, y ];
4255       x = +_[0];
4256       y = +_[1];
4257       return reset();
4258     };
4259     projection.center = function(_) {
4260       if (!arguments.length) return [ λ * d3_degrees, φ * d3_degrees ];
4261       λ = _[0] % 360 * d3_radians;
4262       φ = _[1] % 360 * d3_radians;
4263       return reset();
4264     };
4265     projection.rotate = function(_) {
4266       if (!arguments.length) return [ δλ * d3_degrees, δφ * d3_degrees, δγ * d3_degrees ];
4267       δλ = _[0] % 360 * d3_radians;
4268       δφ = _[1] % 360 * d3_radians;
4269       δγ = _.length > 2 ? _[2] % 360 * d3_radians : 0;
4270       return reset();
4271     };
4272     d3.rebind(projection, projectResample, "precision");
4273     function reset() {
4274       projectRotate = d3_geo_compose(rotate = d3_geo_rotation(δλ, δφ, δγ), project);
4275       var center = project(λ, φ);
4276       δx = x - center[0] * k;
4277       δy = y + center[1] * k;
4278       return invalidate();
4279     }
4280     function invalidate() {
4281       if (stream) stream.valid = false, stream = null;
4282       return projection;
4283     }
4284     return function() {
4285       project = projectAt.apply(this, arguments);
4286       projection.invert = project.invert && invert;
4287       return reset();
4288     };
4289   }
4290   function d3_geo_projectionRadians(stream) {
4291     return d3_geo_transformPoint(stream, function(x, y) {
4292       stream.point(x * d3_radians, y * d3_radians);
4293     });
4294   }
4295   function d3_geo_equirectangular(λ, φ) {
4296     return [ λ, φ ];
4297   }
4298   (d3.geo.equirectangular = function() {
4299     return d3_geo_projection(d3_geo_equirectangular);
4300   }).raw = d3_geo_equirectangular.invert = d3_geo_equirectangular;
4301   d3.geo.rotation = function(rotate) {
4302     rotate = d3_geo_rotation(rotate[0] % 360 * d3_radians, rotate[1] * d3_radians, rotate.length > 2 ? rotate[2] * d3_radians : 0);
4303     function forward(coordinates) {
4304       coordinates = rotate(coordinates[0] * d3_radians, coordinates[1] * d3_radians);
4305       return coordinates[0] *= d3_degrees, coordinates[1] *= d3_degrees, coordinates;
4306     }
4307     forward.invert = function(coordinates) {
4308       coordinates = rotate.invert(coordinates[0] * d3_radians, coordinates[1] * d3_radians);
4309       return coordinates[0] *= d3_degrees, coordinates[1] *= d3_degrees, coordinates;
4310     };
4311     return forward;
4312   };
4313   function d3_geo_identityRotation(λ, φ) {
4314     return [ λ > π ? λ - τ : λ < -π ? λ + τ : λ, φ ];
4315   }
4316   d3_geo_identityRotation.invert = d3_geo_equirectangular;
4317   function d3_geo_rotation(δλ, δφ, δγ) {
4318     return δλ ? δφ || δγ ? d3_geo_compose(d3_geo_rotationλ(δλ), d3_geo_rotationφγ(δφ, δγ)) : d3_geo_rotationλ(δλ) : δφ || δγ ? d3_geo_rotationφγ(δφ, δγ) : d3_geo_identityRotation;
4319   }
4320   function d3_geo_forwardRotationλ(δλ) {
4321     return function(λ, φ) {
4322       return λ += δλ, [ λ > π ? λ - τ : λ < -π ? λ + τ : λ, φ ];
4323     };
4324   }
4325   function d3_geo_rotationλ(δλ) {
4326     var rotation = d3_geo_forwardRotationλ(δλ);
4327     rotation.invert = d3_geo_forwardRotationλ(-δλ);
4328     return rotation;
4329   }
4330   function d3_geo_rotationφγ(δφ, δγ) {
4331     var cosδφ = Math.cos(δφ), sinδφ = Math.sin(δφ), cosδγ = Math.cos(δγ), sinδγ = Math.sin(δγ);
4332     function rotation(λ, φ) {
4333       var cosφ = Math.cos(φ), x = Math.cos(λ) * cosφ, y = Math.sin(λ) * cosφ, z = Math.sin(φ), k = z * cosδφ + x * sinδφ;
4334       return [ Math.atan2(y * cosδγ - k * sinδγ, x * cosδφ - z * sinδφ), d3_asin(k * cosδγ + y * sinδγ) ];
4335     }
4336     rotation.invert = function(λ, φ) {
4337       var cosφ = Math.cos(φ), x = Math.cos(λ) * cosφ, y = Math.sin(λ) * cosφ, z = Math.sin(φ), k = z * cosδγ - y * sinδγ;
4338       return [ Math.atan2(y * cosδγ + z * sinδγ, x * cosδφ + k * sinδφ), d3_asin(k * cosδφ - x * sinδφ) ];
4339     };
4340     return rotation;
4341   }
4342   d3.geo.circle = function() {
4343     var origin = [ 0, 0 ], angle, precision = 6, interpolate;
4344     function circle() {
4345       var center = typeof origin === "function" ? origin.apply(this, arguments) : origin, rotate = d3_geo_rotation(-center[0] * d3_radians, -center[1] * d3_radians, 0).invert, ring = [];
4346       interpolate(null, null, 1, {
4347         point: function(x, y) {
4348           ring.push(x = rotate(x, y));
4349           x[0] *= d3_degrees, x[1] *= d3_degrees;
4350         }
4351       });
4352       return {
4353         type: "Polygon",
4354         coordinates: [ ring ]
4355       };
4356     }
4357     circle.origin = function(x) {
4358       if (!arguments.length) return origin;
4359       origin = x;
4360       return circle;
4361     };
4362     circle.angle = function(x) {
4363       if (!arguments.length) return angle;
4364       interpolate = d3_geo_circleInterpolate((angle = +x) * d3_radians, precision * d3_radians);
4365       return circle;
4366     };
4367     circle.precision = function(_) {
4368       if (!arguments.length) return precision;
4369       interpolate = d3_geo_circleInterpolate(angle * d3_radians, (precision = +_) * d3_radians);
4370       return circle;
4371     };
4372     return circle.angle(90);
4373   };
4374   function d3_geo_circleInterpolate(radius, precision) {
4375     var cr = Math.cos(radius), sr = Math.sin(radius);
4376     return function(from, to, direction, listener) {
4377       var step = direction * precision;
4378       if (from != null) {
4379         from = d3_geo_circleAngle(cr, from);
4380         to = d3_geo_circleAngle(cr, to);
4381         if (direction > 0 ? from < to : from > to) from += direction * τ;
4382       } else {
4383         from = radius + direction * τ;
4384         to = radius - .5 * step;
4385       }
4386       for (var point, t = from; direction > 0 ? t > to : t < to; t -= step) {
4387         listener.point((point = d3_geo_spherical([ cr, -sr * Math.cos(t), -sr * Math.sin(t) ]))[0], point[1]);
4388       }
4389     };
4390   }
4391   function d3_geo_circleAngle(cr, point) {
4392     var a = d3_geo_cartesian(point);
4393     a[0] -= cr;
4394     d3_geo_cartesianNormalize(a);
4395     var angle = d3_acos(-a[1]);
4396     return ((-a[2] < 0 ? -angle : angle) + 2 * Math.PI - ε) % (2 * Math.PI);
4397   }
4398   d3.geo.distance = function(a, b) {
4399     var Δλ = (b[0] - a[0]) * d3_radians, φ0 = a[1] * d3_radians, φ1 = b[1] * d3_radians, sinΔλ = Math.sin(Δλ), cosΔλ = Math.cos(Δλ), sinφ0 = Math.sin(φ0), cosφ0 = Math.cos(φ0), sinφ1 = Math.sin(φ1), cosφ1 = Math.cos(φ1), t;
4400     return Math.atan2(Math.sqrt((t = cosφ1 * sinΔλ) * t + (t = cosφ0 * sinφ1 - sinφ0 * cosφ1 * cosΔλ) * t), sinφ0 * sinφ1 + cosφ0 * cosφ1 * cosΔλ);
4401   };
4402   d3.geo.graticule = function() {
4403     var x1, x0, X1, X0, y1, y0, Y1, Y0, dx = 10, dy = dx, DX = 90, DY = 360, x, y, X, Y, precision = 2.5;
4404     function graticule() {
4405       return {
4406         type: "MultiLineString",
4407         coordinates: lines()
4408       };
4409     }
4410     function lines() {
4411       return d3.range(Math.ceil(X0 / DX) * DX, X1, DX).map(X).concat(d3.range(Math.ceil(Y0 / DY) * DY, Y1, DY).map(Y)).concat(d3.range(Math.ceil(x0 / dx) * dx, x1, dx).filter(function(x) {
4412         return abs(x % DX) > ε;
4413       }).map(x)).concat(d3.range(Math.ceil(y0 / dy) * dy, y1, dy).filter(function(y) {
4414         return abs(y % DY) > ε;
4415       }).map(y));
4416     }
4417     graticule.lines = function() {
4418       return lines().map(function(coordinates) {
4419         return {
4420           type: "LineString",
4421           coordinates: coordinates
4422         };
4423       });
4424     };
4425     graticule.outline = function() {
4426       return {
4427         type: "Polygon",
4428         coordinates: [ X(X0).concat(Y(Y1).slice(1), X(X1).reverse().slice(1), Y(Y0).reverse().slice(1)) ]
4429       };
4430     };
4431     graticule.extent = function(_) {
4432       if (!arguments.length) return graticule.minorExtent();
4433       return graticule.majorExtent(_).minorExtent(_);
4434     };
4435     graticule.majorExtent = function(_) {
4436       if (!arguments.length) return [ [ X0, Y0 ], [ X1, Y1 ] ];
4437       X0 = +_[0][0], X1 = +_[1][0];
4438       Y0 = +_[0][1], Y1 = +_[1][1];
4439       if (X0 > X1) _ = X0, X0 = X1, X1 = _;
4440       if (Y0 > Y1) _ = Y0, Y0 = Y1, Y1 = _;
4441       return graticule.precision(precision);
4442     };
4443     graticule.minorExtent = function(_) {
4444       if (!arguments.length) return [ [ x0, y0 ], [ x1, y1 ] ];
4445       x0 = +_[0][0], x1 = +_[1][0];
4446       y0 = +_[0][1], y1 = +_[1][1];
4447       if (x0 > x1) _ = x0, x0 = x1, x1 = _;
4448       if (y0 > y1) _ = y0, y0 = y1, y1 = _;
4449       return graticule.precision(precision);
4450     };
4451     graticule.step = function(_) {
4452       if (!arguments.length) return graticule.minorStep();
4453       return graticule.majorStep(_).minorStep(_);
4454     };
4455     graticule.majorStep = function(_) {
4456       if (!arguments.length) return [ DX, DY ];
4457       DX = +_[0], DY = +_[1];
4458       return graticule;
4459     };
4460     graticule.minorStep = function(_) {
4461       if (!arguments.length) return [ dx, dy ];
4462       dx = +_[0], dy = +_[1];
4463       return graticule;
4464     };
4465     graticule.precision = function(_) {
4466       if (!arguments.length) return precision;
4467       precision = +_;
4468       x = d3_geo_graticuleX(y0, y1, 90);
4469       y = d3_geo_graticuleY(x0, x1, precision);
4470       X = d3_geo_graticuleX(Y0, Y1, 90);
4471       Y = d3_geo_graticuleY(X0, X1, precision);
4472       return graticule;
4473     };
4474     return graticule.majorExtent([ [ -180, -90 + ε ], [ 180, 90 - ε ] ]).minorExtent([ [ -180, -80 - ε ], [ 180, 80 + ε ] ]);
4475   };
4476   function d3_geo_graticuleX(y0, y1, dy) {
4477     var y = d3.range(y0, y1 - ε, dy).concat(y1);
4478     return function(x) {
4479       return y.map(function(y) {
4480         return [ x, y ];
4481       });
4482     };
4483   }
4484   function d3_geo_graticuleY(x0, x1, dx) {
4485     var x = d3.range(x0, x1 - ε, dx).concat(x1);
4486     return function(y) {
4487       return x.map(function(x) {
4488         return [ x, y ];
4489       });
4490     };
4491   }
4492   function d3_source(d) {
4493     return d.source;
4494   }
4495   function d3_target(d) {
4496     return d.target;
4497   }
4498   d3.geo.greatArc = function() {
4499     var source = d3_source, source_, target = d3_target, target_;
4500     function greatArc() {
4501       return {
4502         type: "LineString",
4503         coordinates: [ source_ || source.apply(this, arguments), target_ || target.apply(this, arguments) ]
4504       };
4505     }
4506     greatArc.distance = function() {
4507       return d3.geo.distance(source_ || source.apply(this, arguments), target_ || target.apply(this, arguments));
4508     };
4509     greatArc.source = function(_) {
4510       if (!arguments.length) return source;
4511       source = _, source_ = typeof _ === "function" ? null : _;
4512       return greatArc;
4513     };
4514     greatArc.target = function(_) {
4515       if (!arguments.length) return target;
4516       target = _, target_ = typeof _ === "function" ? null : _;
4517       return greatArc;
4518     };
4519     greatArc.precision = function() {
4520       return arguments.length ? greatArc : 0;
4521     };
4522     return greatArc;
4523   };
4524   d3.geo.interpolate = function(source, target) {
4525     return d3_geo_interpolate(source[0] * d3_radians, source[1] * d3_radians, target[0] * d3_radians, target[1] * d3_radians);
4526   };
4527   function d3_geo_interpolate(x0, y0, x1, y1) {
4528     var cy0 = Math.cos(y0), sy0 = Math.sin(y0), cy1 = Math.cos(y1), sy1 = Math.sin(y1), kx0 = cy0 * Math.cos(x0), ky0 = cy0 * Math.sin(x0), kx1 = cy1 * Math.cos(x1), ky1 = cy1 * Math.sin(x1), d = 2 * Math.asin(Math.sqrt(d3_haversin(y1 - y0) + cy0 * cy1 * d3_haversin(x1 - x0))), k = 1 / Math.sin(d);
4529     var interpolate = d ? function(t) {
4530       var B = Math.sin(t *= d) * k, A = Math.sin(d - t) * k, x = A * kx0 + B * kx1, y = A * ky0 + B * ky1, z = A * sy0 + B * sy1;
4531       return [ Math.atan2(y, x) * d3_degrees, Math.atan2(z, Math.sqrt(x * x + y * y)) * d3_degrees ];
4532     } : function() {
4533       return [ x0 * d3_degrees, y0 * d3_degrees ];
4534     };
4535     interpolate.distance = d;
4536     return interpolate;
4537   }
4538   d3.geo.length = function(object) {
4539     d3_geo_lengthSum = 0;
4540     d3.geo.stream(object, d3_geo_length);
4541     return d3_geo_lengthSum;
4542   };
4543   var d3_geo_lengthSum;
4544   var d3_geo_length = {
4545     sphere: d3_noop,
4546     point: d3_noop,
4547     lineStart: d3_geo_lengthLineStart,
4548     lineEnd: d3_noop,
4549     polygonStart: d3_noop,
4550     polygonEnd: d3_noop
4551   };
4552   function d3_geo_lengthLineStart() {
4553     var λ0, sinφ0, cosφ0;
4554     d3_geo_length.point = function(λ, φ) {
4555       λ0 = λ * d3_radians, sinφ0 = Math.sin(φ *= d3_radians), cosφ0 = Math.cos(φ);
4556       d3_geo_length.point = nextPoint;
4557     };
4558     d3_geo_length.lineEnd = function() {
4559       d3_geo_length.point = d3_geo_length.lineEnd = d3_noop;
4560     };
4561     function nextPoint(λ, φ) {
4562       var sinφ = Math.sin(φ *= d3_radians), cosφ = Math.cos(φ), t = abs((λ *= d3_radians) - λ0), cosΔλ = Math.cos(t);
4563       d3_geo_lengthSum += Math.atan2(Math.sqrt((t = cosφ * Math.sin(t)) * t + (t = cosφ0 * sinφ - sinφ0 * cosφ * cosΔλ) * t), sinφ0 * sinφ + cosφ0 * cosφ * cosΔλ);
4564       λ0 = λ, sinφ0 = sinφ, cosφ0 = cosφ;
4565     }
4566   }
4567   function d3_geo_azimuthal(scale, angle) {
4568     function azimuthal(λ, φ) {
4569       var cosλ = Math.cos(λ), cosφ = Math.cos(φ), k = scale(cosλ * cosφ);
4570       return [ k * cosφ * Math.sin(λ), k * Math.sin(φ) ];
4571     }
4572     azimuthal.invert = function(x, y) {
4573       var ρ = Math.sqrt(x * x + y * y), c = angle(ρ), sinc = Math.sin(c), cosc = Math.cos(c);
4574       return [ Math.atan2(x * sinc, ρ * cosc), Math.asin(ρ && y * sinc / ρ) ];
4575     };
4576     return azimuthal;
4577   }
4578   var d3_geo_azimuthalEqualArea = d3_geo_azimuthal(function(cosλcosφ) {
4579     return Math.sqrt(2 / (1 + cosλcosφ));
4580   }, function(ρ) {
4581     return 2 * Math.asin(ρ / 2);
4582   });
4583   (d3.geo.azimuthalEqualArea = function() {
4584     return d3_geo_projection(d3_geo_azimuthalEqualArea);
4585   }).raw = d3_geo_azimuthalEqualArea;
4586   var d3_geo_azimuthalEquidistant = d3_geo_azimuthal(function(cosλcosφ) {
4587     var c = Math.acos(cosλcosφ);
4588     return c && c / Math.sin(c);
4589   }, d3_identity);
4590   (d3.geo.azimuthalEquidistant = function() {
4591     return d3_geo_projection(d3_geo_azimuthalEquidistant);
4592   }).raw = d3_geo_azimuthalEquidistant;
4593   function d3_geo_conicConformal(φ0, φ1) {
4594     var cosφ0 = Math.cos(φ0), t = function(φ) {
4595       return Math.tan(π / 4 + φ / 2);
4596     }, n = φ0 === φ1 ? Math.sin(φ0) : Math.log(cosφ0 / Math.cos(φ1)) / Math.log(t(φ1) / t(φ0)), F = cosφ0 * Math.pow(t(φ0), n) / n;
4597     if (!n) return d3_geo_mercator;
4598     function forward(λ, φ) {
4599       if (F > 0) {
4600         if (φ < -halfπ + ε) φ = -halfπ + ε;
4601       } else {
4602         if (φ > halfπ - ε) φ = halfπ - ε;
4603       }
4604       var ρ = F / Math.pow(t(φ), n);
4605       return [ ρ * Math.sin(n * λ), F - ρ * Math.cos(n * λ) ];
4606     }
4607     forward.invert = function(x, y) {
4608       var ρ0_y = F - y, ρ = d3_sgn(n) * Math.sqrt(x * x + ρ0_y * ρ0_y);
4609       return [ Math.atan2(x, ρ0_y) / n, 2 * Math.atan(Math.pow(F / ρ, 1 / n)) - halfπ ];
4610     };
4611     return forward;
4612   }
4613   (d3.geo.conicConformal = function() {
4614     return d3_geo_conic(d3_geo_conicConformal);
4615   }).raw = d3_geo_conicConformal;
4616   function d3_geo_conicEquidistant(φ0, φ1) {
4617     var cosφ0 = Math.cos(φ0), n = φ0 === φ1 ? Math.sin(φ0) : (cosφ0 - Math.cos(φ1)) / (φ1 - φ0), G = cosφ0 / n + φ0;
4618     if (abs(n) < ε) return d3_geo_equirectangular;
4619     function forward(λ, φ) {
4620       var ρ = G - φ;
4621       return [ ρ * Math.sin(n * λ), G - ρ * Math.cos(n * λ) ];
4622     }
4623     forward.invert = function(x, y) {
4624       var ρ0_y = G - y;
4625       return [ Math.atan2(x, ρ0_y) / n, G - d3_sgn(n) * Math.sqrt(x * x + ρ0_y * ρ0_y) ];
4626     };
4627     return forward;
4628   }
4629   (d3.geo.conicEquidistant = function() {
4630     return d3_geo_conic(d3_geo_conicEquidistant);
4631   }).raw = d3_geo_conicEquidistant;
4632   var d3_geo_gnomonic = d3_geo_azimuthal(function(cosλcosφ) {
4633     return 1 / cosλcosφ;
4634   }, Math.atan);
4635   (d3.geo.gnomonic = function() {
4636     return d3_geo_projection(d3_geo_gnomonic);
4637   }).raw = d3_geo_gnomonic;
4638   function d3_geo_mercator(λ, φ) {
4639     return [ λ, Math.log(Math.tan(π / 4 + φ / 2)) ];
4640   }
4641   d3_geo_mercator.invert = function(x, y) {
4642     return [ x, 2 * Math.atan(Math.exp(y)) - halfπ ];
4643   };
4644   function d3_geo_mercatorProjection(project) {
4645     var m = d3_geo_projection(project), scale = m.scale, translate = m.translate, clipExtent = m.clipExtent, clipAuto;
4646     m.scale = function() {
4647       var v = scale.apply(m, arguments);
4648       return v === m ? clipAuto ? m.clipExtent(null) : m : v;
4649     };
4650     m.translate = function() {
4651       var v = translate.apply(m, arguments);
4652       return v === m ? clipAuto ? m.clipExtent(null) : m : v;
4653     };
4654     m.clipExtent = function(_) {
4655       var v = clipExtent.apply(m, arguments);
4656       if (v === m) {
4657         if (clipAuto = _ == null) {
4658           var k = π * scale(), t = translate();
4659           clipExtent([ [ t[0] - k, t[1] - k ], [ t[0] + k, t[1] + k ] ]);
4660         }
4661       } else if (clipAuto) {
4662         v = null;
4663       }
4664       return v;
4665     };
4666     return m.clipExtent(null);
4667   }
4668   (d3.geo.mercator = function() {
4669     return d3_geo_mercatorProjection(d3_geo_mercator);
4670   }).raw = d3_geo_mercator;
4671   var d3_geo_orthographic = d3_geo_azimuthal(function() {
4672     return 1;
4673   }, Math.asin);
4674   (d3.geo.orthographic = function() {
4675     return d3_geo_projection(d3_geo_orthographic);
4676   }).raw = d3_geo_orthographic;
4677   var d3_geo_stereographic = d3_geo_azimuthal(function(cosλcosφ) {
4678     return 1 / (1 + cosλcosφ);
4679   }, function(ρ) {
4680     return 2 * Math.atan(ρ);
4681   });
4682   (d3.geo.stereographic = function() {
4683     return d3_geo_projection(d3_geo_stereographic);
4684   }).raw = d3_geo_stereographic;
4685   function d3_geo_transverseMercator(λ, φ) {
4686     return [ Math.log(Math.tan(π / 4 + φ / 2)), -λ ];
4687   }
4688   d3_geo_transverseMercator.invert = function(x, y) {
4689     return [ -y, 2 * Math.atan(Math.exp(x)) - halfπ ];
4690   };
4691   (d3.geo.transverseMercator = function() {
4692     var projection = d3_geo_mercatorProjection(d3_geo_transverseMercator), center = projection.center, rotate = projection.rotate;
4693     projection.center = function(_) {
4694       return _ ? center([ -_[1], _[0] ]) : (_ = center(), [ -_[1], _[0] ]);
4695     };
4696     projection.rotate = function(_) {
4697       return _ ? rotate([ _[0], _[1], _.length > 2 ? _[2] + 90 : 90 ]) : (_ = rotate(),
4698       [ _[0], _[1], _[2] - 90 ]);
4699     };
4700     return projection.rotate([ 0, 0 ]);
4701   }).raw = d3_geo_transverseMercator;
4702   d3.geom = {};
4703   function d3_geom_pointX(d) {
4704     return d[0];
4705   }
4706   function d3_geom_pointY(d) {
4707     return d[1];
4708   }
4709   d3.geom.hull = function(vertices) {
4710     var x = d3_geom_pointX, y = d3_geom_pointY;
4711     if (arguments.length) return hull(vertices);
4712     function hull(data) {
4713       if (data.length < 3) return [];
4714       var fx = d3_functor(x), fy = d3_functor(y), i, n = data.length, points = [], flippedPoints = [];
4715       for (i = 0; i < n; i++) {
4716         points.push([ +fx.call(this, data[i], i), +fy.call(this, data[i], i), i ]);
4717       }
4718       points.sort(d3_geom_hullOrder);
4719       for (i = 0; i < n; i++) flippedPoints.push([ points[i][0], -points[i][1] ]);
4720       var upper = d3_geom_hullUpper(points), lower = d3_geom_hullUpper(flippedPoints);
4721       var skipLeft = lower[0] === upper[0], skipRight = lower[lower.length - 1] === upper[upper.length - 1], polygon = [];
4722       for (i = upper.length - 1; i >= 0; --i) polygon.push(data[points[upper[i]][2]]);
4723       for (i = +skipLeft; i < lower.length - skipRight; ++i) polygon.push(data[points[lower[i]][2]]);
4724       return polygon;
4725     }
4726     hull.x = function(_) {
4727       return arguments.length ? (x = _, hull) : x;
4728     };
4729     hull.y = function(_) {
4730       return arguments.length ? (y = _, hull) : y;
4731     };
4732     return hull;
4733   };
4734   function d3_geom_hullUpper(points) {
4735     var n = points.length, hull = [ 0, 1 ], hs = 2;
4736     for (var i = 2; i < n; i++) {
4737       while (hs > 1 && d3_cross2d(points[hull[hs - 2]], points[hull[hs - 1]], points[i]) <= 0) --hs;
4738       hull[hs++] = i;
4739     }
4740     return hull.slice(0, hs);
4741   }
4742   function d3_geom_hullOrder(a, b) {
4743     return a[0] - b[0] || a[1] - b[1];
4744   }
4745   d3.geom.polygon = function(coordinates) {
4746     d3_subclass(coordinates, d3_geom_polygonPrototype);
4747     return coordinates;
4748   };
4749   var d3_geom_polygonPrototype = d3.geom.polygon.prototype = [];
4750   d3_geom_polygonPrototype.area = function() {
4751     var i = -1, n = this.length, a, b = this[n - 1], area = 0;
4752     while (++i < n) {
4753       a = b;
4754       b = this[i];
4755       area += a[1] * b[0] - a[0] * b[1];
4756     }
4757     return area * .5;
4758   };
4759   d3_geom_polygonPrototype.centroid = function(k) {
4760     var i = -1, n = this.length, x = 0, y = 0, a, b = this[n - 1], c;
4761     if (!arguments.length) k = -1 / (6 * this.area());
4762     while (++i < n) {
4763       a = b;
4764       b = this[i];
4765       c = a[0] * b[1] - b[0] * a[1];
4766       x += (a[0] + b[0]) * c;
4767       y += (a[1] + b[1]) * c;
4768     }
4769     return [ x * k, y * k ];
4770   };
4771   d3_geom_polygonPrototype.clip = function(subject) {
4772     var input, closed = d3_geom_polygonClosed(subject), i = -1, n = this.length - d3_geom_polygonClosed(this), j, m, a = this[n - 1], b, c, d;
4773     while (++i < n) {
4774       input = subject.slice();
4775       subject.length = 0;
4776       b = this[i];
4777       c = input[(m = input.length - closed) - 1];
4778       j = -1;
4779       while (++j < m) {
4780         d = input[j];
4781         if (d3_geom_polygonInside(d, a, b)) {
4782           if (!d3_geom_polygonInside(c, a, b)) {
4783             subject.push(d3_geom_polygonIntersect(c, d, a, b));
4784           }
4785           subject.push(d);
4786         } else if (d3_geom_polygonInside(c, a, b)) {
4787           subject.push(d3_geom_polygonIntersect(c, d, a, b));
4788         }
4789         c = d;
4790       }
4791       if (closed) subject.push(subject[0]);
4792       a = b;
4793     }
4794     return subject;
4795   };
4796   function d3_geom_polygonInside(p, a, b) {
4797     return (b[0] - a[0]) * (p[1] - a[1]) < (b[1] - a[1]) * (p[0] - a[0]);
4798   }
4799   function d3_geom_polygonIntersect(c, d, a, b) {
4800     var x1 = c[0], x3 = a[0], x21 = d[0] - x1, x43 = b[0] - x3, y1 = c[1], y3 = a[1], y21 = d[1] - y1, y43 = b[1] - y3, ua = (x43 * (y1 - y3) - y43 * (x1 - x3)) / (y43 * x21 - x43 * y21);
4801     return [ x1 + ua * x21, y1 + ua * y21 ];
4802   }
4803   function d3_geom_polygonClosed(coordinates) {
4804     var a = coordinates[0], b = coordinates[coordinates.length - 1];
4805     return !(a[0] - b[0] || a[1] - b[1]);
4806   }
4807   var d3_geom_voronoiEdges, d3_geom_voronoiCells, d3_geom_voronoiBeaches, d3_geom_voronoiBeachPool = [], d3_geom_voronoiFirstCircle, d3_geom_voronoiCircles, d3_geom_voronoiCirclePool = [];
4808   function d3_geom_voronoiBeach() {
4809     d3_geom_voronoiRedBlackNode(this);
4810     this.edge = this.site = this.circle = null;
4811   }
4812   function d3_geom_voronoiCreateBeach(site) {
4813     var beach = d3_geom_voronoiBeachPool.pop() || new d3_geom_voronoiBeach();
4814     beach.site = site;
4815     return beach;
4816   }
4817   function d3_geom_voronoiDetachBeach(beach) {
4818     d3_geom_voronoiDetachCircle(beach);
4819     d3_geom_voronoiBeaches.remove(beach);
4820     d3_geom_voronoiBeachPool.push(beach);
4821     d3_geom_voronoiRedBlackNode(beach);
4822   }
4823   function d3_geom_voronoiRemoveBeach(beach) {
4824     var circle = beach.circle, x = circle.x, y = circle.cy, vertex = {
4825       x: x,
4826       y: y
4827     }, previous = beach.P, next = beach.N, disappearing = [ beach ];
4828     d3_geom_voronoiDetachBeach(beach);
4829     var lArc = previous;
4830     while (lArc.circle && abs(x - lArc.circle.x) < ε && abs(y - lArc.circle.cy) < ε) {
4831       previous = lArc.P;
4832       disappearing.unshift(lArc);
4833       d3_geom_voronoiDetachBeach(lArc);
4834       lArc = previous;
4835     }
4836     disappearing.unshift(lArc);
4837     d3_geom_voronoiDetachCircle(lArc);
4838     var rArc = next;
4839     while (rArc.circle && abs(x - rArc.circle.x) < ε && abs(y - rArc.circle.cy) < ε) {
4840       next = rArc.N;
4841       disappearing.push(rArc);
4842       d3_geom_voronoiDetachBeach(rArc);
4843       rArc = next;
4844     }
4845     disappearing.push(rArc);
4846     d3_geom_voronoiDetachCircle(rArc);
4847     var nArcs = disappearing.length, iArc;
4848     for (iArc = 1; iArc < nArcs; ++iArc) {
4849       rArc = disappearing[iArc];
4850       lArc = disappearing[iArc - 1];
4851       d3_geom_voronoiSetEdgeEnd(rArc.edge, lArc.site, rArc.site, vertex);
4852     }
4853     lArc = disappearing[0];
4854     rArc = disappearing[nArcs - 1];
4855     rArc.edge = d3_geom_voronoiCreateEdge(lArc.site, rArc.site, null, vertex);
4856     d3_geom_voronoiAttachCircle(lArc);
4857     d3_geom_voronoiAttachCircle(rArc);
4858   }
4859   function d3_geom_voronoiAddBeach(site) {
4860     var x = site.x, directrix = site.y, lArc, rArc, dxl, dxr, node = d3_geom_voronoiBeaches._;
4861     while (node) {
4862       dxl = d3_geom_voronoiLeftBreakPoint(node, directrix) - x;
4863       if (dxl > ε) node = node.L; else {
4864         dxr = x - d3_geom_voronoiRightBreakPoint(node, directrix);
4865         if (dxr > ε) {
4866           if (!node.R) {
4867             lArc = node;
4868             break;
4869           }
4870           node = node.R;
4871         } else {
4872           if (dxl > -ε) {
4873             lArc = node.P;
4874             rArc = node;
4875           } else if (dxr > -ε) {
4876             lArc = node;
4877             rArc = node.N;
4878           } else {
4879             lArc = rArc = node;
4880           }
4881           break;
4882         }
4883       }
4884     }
4885     var newArc = d3_geom_voronoiCreateBeach(site);
4886     d3_geom_voronoiBeaches.insert(lArc, newArc);
4887     if (!lArc && !rArc) return;
4888     if (lArc === rArc) {
4889       d3_geom_voronoiDetachCircle(lArc);
4890       rArc = d3_geom_voronoiCreateBeach(lArc.site);
4891       d3_geom_voronoiBeaches.insert(newArc, rArc);
4892       newArc.edge = rArc.edge = d3_geom_voronoiCreateEdge(lArc.site, newArc.site);
4893       d3_geom_voronoiAttachCircle(lArc);
4894       d3_geom_voronoiAttachCircle(rArc);
4895       return;
4896     }
4897     if (!rArc) {
4898       newArc.edge = d3_geom_voronoiCreateEdge(lArc.site, newArc.site);
4899       return;
4900     }
4901     d3_geom_voronoiDetachCircle(lArc);
4902     d3_geom_voronoiDetachCircle(rArc);
4903     var lSite = lArc.site, ax = lSite.x, ay = lSite.y, bx = site.x - ax, by = site.y - ay, rSite = rArc.site, cx = rSite.x - ax, cy = rSite.y - ay, d = 2 * (bx * cy - by * cx), hb = bx * bx + by * by, hc = cx * cx + cy * cy, vertex = {
4904       x: (cy * hb - by * hc) / d + ax,
4905       y: (bx * hc - cx * hb) / d + ay
4906     };
4907     d3_geom_voronoiSetEdgeEnd(rArc.edge, lSite, rSite, vertex);
4908     newArc.edge = d3_geom_voronoiCreateEdge(lSite, site, null, vertex);
4909     rArc.edge = d3_geom_voronoiCreateEdge(site, rSite, null, vertex);
4910     d3_geom_voronoiAttachCircle(lArc);
4911     d3_geom_voronoiAttachCircle(rArc);
4912   }
4913   function d3_geom_voronoiLeftBreakPoint(arc, directrix) {
4914     var site = arc.site, rfocx = site.x, rfocy = site.y, pby2 = rfocy - directrix;
4915     if (!pby2) return rfocx;
4916     var lArc = arc.P;
4917     if (!lArc) return -Infinity;
4918     site = lArc.site;
4919     var lfocx = site.x, lfocy = site.y, plby2 = lfocy - directrix;
4920     if (!plby2) return lfocx;
4921     var hl = lfocx - rfocx, aby2 = 1 / pby2 - 1 / plby2, b = hl / plby2;
4922     if (aby2) return (-b + Math.sqrt(b * b - 2 * aby2 * (hl * hl / (-2 * plby2) - lfocy + plby2 / 2 + rfocy - pby2 / 2))) / aby2 + rfocx;
4923     return (rfocx + lfocx) / 2;
4924   }
4925   function d3_geom_voronoiRightBreakPoint(arc, directrix) {
4926     var rArc = arc.N;
4927     if (rArc) return d3_geom_voronoiLeftBreakPoint(rArc, directrix);
4928     var site = arc.site;
4929     return site.y === directrix ? site.x : Infinity;
4930   }
4931   function d3_geom_voronoiCell(site) {
4932     this.site = site;
4933     this.edges = [];
4934   }
4935   d3_geom_voronoiCell.prototype.prepare = function() {
4936     var halfEdges = this.edges, iHalfEdge = halfEdges.length, edge;
4937     while (iHalfEdge--) {
4938       edge = halfEdges[iHalfEdge].edge;
4939       if (!edge.b || !edge.a) halfEdges.splice(iHalfEdge, 1);
4940     }
4941     halfEdges.sort(d3_geom_voronoiHalfEdgeOrder);
4942     return halfEdges.length;
4943   };
4944   function d3_geom_voronoiCloseCells(extent) {
4945     var x0 = extent[0][0], x1 = extent[1][0], y0 = extent[0][1], y1 = extent[1][1], x2, y2, x3, y3, cells = d3_geom_voronoiCells, iCell = cells.length, cell, iHalfEdge, halfEdges, nHalfEdges, start, end;
4946     while (iCell--) {
4947       cell = cells[iCell];
4948       if (!cell || !cell.prepare()) continue;
4949       halfEdges = cell.edges;
4950       nHalfEdges = halfEdges.length;
4951       iHalfEdge = 0;
4952       while (iHalfEdge < nHalfEdges) {
4953         end = halfEdges[iHalfEdge].end(), x3 = end.x, y3 = end.y;
4954         start = halfEdges[++iHalfEdge % nHalfEdges].start(), x2 = start.x, y2 = start.y;
4955         if (abs(x3 - x2) > ε || abs(y3 - y2) > ε) {
4956           halfEdges.splice(iHalfEdge, 0, new d3_geom_voronoiHalfEdge(d3_geom_voronoiCreateBorderEdge(cell.site, end, abs(x3 - x0) < ε && y1 - y3 > ε ? {
4957             x: x0,
4958             y: abs(x2 - x0) < ε ? y2 : y1
4959           } : abs(y3 - y1) < ε && x1 - x3 > ε ? {
4960             x: abs(y2 - y1) < ε ? x2 : x1,
4961             y: y1
4962           } : abs(x3 - x1) < ε && y3 - y0 > ε ? {
4963             x: x1,
4964             y: abs(x2 - x1) < ε ? y2 : y0
4965           } : abs(y3 - y0) < ε && x3 - x0 > ε ? {
4966             x: abs(y2 - y0) < ε ? x2 : x0,
4967             y: y0
4968           } : null), cell.site, null));
4969           ++nHalfEdges;
4970         }
4971       }
4972     }
4973   }
4974   function d3_geom_voronoiHalfEdgeOrder(a, b) {
4975     return b.angle - a.angle;
4976   }
4977   function d3_geom_voronoiCircle() {
4978     d3_geom_voronoiRedBlackNode(this);
4979     this.x = this.y = this.arc = this.site = this.cy = null;
4980   }
4981   function d3_geom_voronoiAttachCircle(arc) {
4982     var lArc = arc.P, rArc = arc.N;
4983     if (!lArc || !rArc) return;
4984     var lSite = lArc.site, cSite = arc.site, rSite = rArc.site;
4985     if (lSite === rSite) return;
4986     var bx = cSite.x, by = cSite.y, ax = lSite.x - bx, ay = lSite.y - by, cx = rSite.x - bx, cy = rSite.y - by;
4987     var d = 2 * (ax * cy - ay * cx);
4988     if (d >= -ε2) return;
4989     var ha = ax * ax + ay * ay, hc = cx * cx + cy * cy, x = (cy * ha - ay * hc) / d, y = (ax * hc - cx * ha) / d, cy = y + by;
4990     var circle = d3_geom_voronoiCirclePool.pop() || new d3_geom_voronoiCircle();
4991     circle.arc = arc;
4992     circle.site = cSite;
4993     circle.x = x + bx;
4994     circle.y = cy + Math.sqrt(x * x + y * y);
4995     circle.cy = cy;
4996     arc.circle = circle;
4997     var before = null, node = d3_geom_voronoiCircles._;
4998     while (node) {
4999       if (circle.y < node.y || circle.y === node.y && circle.x <= node.x) {
5000         if (node.L) node = node.L; else {
5001           before = node.P;
5002           break;
5003         }
5004       } else {
5005         if (node.R) node = node.R; else {
5006           before = node;
5007           break;
5008         }
5009       }
5010     }
5011     d3_geom_voronoiCircles.insert(before, circle);
5012     if (!before) d3_geom_voronoiFirstCircle = circle;
5013   }
5014   function d3_geom_voronoiDetachCircle(arc) {
5015     var circle = arc.circle;
5016     if (circle) {
5017       if (!circle.P) d3_geom_voronoiFirstCircle = circle.N;
5018       d3_geom_voronoiCircles.remove(circle);
5019       d3_geom_voronoiCirclePool.push(circle);
5020       d3_geom_voronoiRedBlackNode(circle);
5021       arc.circle = null;
5022     }
5023   }
5024   function d3_geom_voronoiClipEdges(extent) {
5025     var edges = d3_geom_voronoiEdges, clip = d3_geom_clipLine(extent[0][0], extent[0][1], extent[1][0], extent[1][1]), i = edges.length, e;
5026     while (i--) {
5027       e = edges[i];
5028       if (!d3_geom_voronoiConnectEdge(e, extent) || !clip(e) || abs(e.a.x - e.b.x) < ε && abs(e.a.y - e.b.y) < ε) {
5029         e.a = e.b = null;
5030         edges.splice(i, 1);
5031       }
5032     }
5033   }
5034   function d3_geom_voronoiConnectEdge(edge, extent) {
5035     var vb = edge.b;
5036     if (vb) return true;
5037     var va = edge.a, x0 = extent[0][0], x1 = extent[1][0], y0 = extent[0][1], y1 = extent[1][1], lSite = edge.l, rSite = edge.r, lx = lSite.x, ly = lSite.y, rx = rSite.x, ry = rSite.y, fx = (lx + rx) / 2, fy = (ly + ry) / 2, fm, fb;
5038     if (ry === ly) {
5039       if (fx < x0 || fx >= x1) return;
5040       if (lx > rx) {
5041         if (!va) va = {
5042           x: fx,
5043           y: y0
5044         }; else if (va.y >= y1) return;
5045         vb = {
5046           x: fx,
5047           y: y1
5048         };
5049       } else {
5050         if (!va) va = {
5051           x: fx,
5052           y: y1
5053         }; else if (va.y < y0) return;
5054         vb = {
5055           x: fx,
5056           y: y0
5057         };
5058       }
5059     } else {
5060       fm = (lx - rx) / (ry - ly);
5061       fb = fy - fm * fx;
5062       if (fm < -1 || fm > 1) {
5063         if (lx > rx) {
5064           if (!va) va = {
5065             x: (y0 - fb) / fm,
5066             y: y0
5067           }; else if (va.y >= y1) return;
5068           vb = {
5069             x: (y1 - fb) / fm,
5070             y: y1
5071           };
5072         } else {
5073           if (!va) va = {
5074             x: (y1 - fb) / fm,
5075             y: y1
5076           }; else if (va.y < y0) return;
5077           vb = {
5078             x: (y0 - fb) / fm,
5079             y: y0
5080           };
5081         }
5082       } else {
5083         if (ly < ry) {
5084           if (!va) va = {
5085             x: x0,
5086             y: fm * x0 + fb
5087           }; else if (va.x >= x1) return;
5088           vb = {
5089             x: x1,
5090             y: fm * x1 + fb
5091           };
5092         } else {
5093           if (!va) va = {
5094             x: x1,
5095             y: fm * x1 + fb
5096           }; else if (va.x < x0) return;
5097           vb = {
5098             x: x0,
5099             y: fm * x0 + fb
5100           };
5101         }
5102       }
5103     }
5104     edge.a = va;
5105     edge.b = vb;
5106     return true;
5107   }
5108   function d3_geom_voronoiEdge(lSite, rSite) {
5109     this.l = lSite;
5110     this.r = rSite;
5111     this.a = this.b = null;
5112   }
5113   function d3_geom_voronoiCreateEdge(lSite, rSite, va, vb) {
5114     var edge = new d3_geom_voronoiEdge(lSite, rSite);
5115     d3_geom_voronoiEdges.push(edge);
5116     if (va) d3_geom_voronoiSetEdgeEnd(edge, lSite, rSite, va);
5117     if (vb) d3_geom_voronoiSetEdgeEnd(edge, rSite, lSite, vb);
5118     d3_geom_voronoiCells[lSite.i].edges.push(new d3_geom_voronoiHalfEdge(edge, lSite, rSite));
5119     d3_geom_voronoiCells[rSite.i].edges.push(new d3_geom_voronoiHalfEdge(edge, rSite, lSite));
5120     return edge;
5121   }
5122   function d3_geom_voronoiCreateBorderEdge(lSite, va, vb) {
5123     var edge = new d3_geom_voronoiEdge(lSite, null);
5124     edge.a = va;
5125     edge.b = vb;
5126     d3_geom_voronoiEdges.push(edge);
5127     return edge;
5128   }
5129   function d3_geom_voronoiSetEdgeEnd(edge, lSite, rSite, vertex) {
5130     if (!edge.a && !edge.b) {
5131       edge.a = vertex;
5132       edge.l = lSite;
5133       edge.r = rSite;
5134     } else if (edge.l === rSite) {
5135       edge.b = vertex;
5136     } else {
5137       edge.a = vertex;
5138     }
5139   }
5140   function d3_geom_voronoiHalfEdge(edge, lSite, rSite) {
5141     var va = edge.a, vb = edge.b;
5142     this.edge = edge;
5143     this.site = lSite;
5144     this.angle = rSite ? Math.atan2(rSite.y - lSite.y, rSite.x - lSite.x) : edge.l === lSite ? Math.atan2(vb.x - va.x, va.y - vb.y) : Math.atan2(va.x - vb.x, vb.y - va.y);
5145   }
5146   d3_geom_voronoiHalfEdge.prototype = {
5147     start: function() {
5148       return this.edge.l === this.site ? this.edge.a : this.edge.b;
5149     },
5150     end: function() {
5151       return this.edge.l === this.site ? this.edge.b : this.edge.a;
5152     }
5153   };
5154   function d3_geom_voronoiRedBlackTree() {
5155     this._ = null;
5156   }
5157   function d3_geom_voronoiRedBlackNode(node) {
5158     node.U = node.C = node.L = node.R = node.P = node.N = null;
5159   }
5160   d3_geom_voronoiRedBlackTree.prototype = {
5161     insert: function(after, node) {
5162       var parent, grandpa, uncle;
5163       if (after) {
5164         node.P = after;
5165         node.N = after.N;
5166         if (after.N) after.N.P = node;
5167         after.N = node;
5168         if (after.R) {
5169           after = after.R;
5170           while (after.L) after = after.L;
5171           after.L = node;
5172         } else {
5173           after.R = node;
5174         }
5175         parent = after;
5176       } else if (this._) {
5177         after = d3_geom_voronoiRedBlackFirst(this._);
5178         node.P = null;
5179         node.N = after;
5180         after.P = after.L = node;
5181         parent = after;
5182       } else {
5183         node.P = node.N = null;
5184         this._ = node;
5185         parent = null;
5186       }
5187       node.L = node.R = null;
5188       node.U = parent;
5189       node.C = true;
5190       after = node;
5191       while (parent && parent.C) {
5192         grandpa = parent.U;
5193         if (parent === grandpa.L) {
5194           uncle = grandpa.R;
5195           if (uncle && uncle.C) {
5196             parent.C = uncle.C = false;
5197             grandpa.C = true;
5198             after = grandpa;
5199           } else {
5200             if (after === parent.R) {
5201               d3_geom_voronoiRedBlackRotateLeft(this, parent);
5202               after = parent;
5203               parent = after.U;
5204             }
5205             parent.C = false;
5206             grandpa.C = true;
5207             d3_geom_voronoiRedBlackRotateRight(this, grandpa);
5208           }
5209         } else {
5210           uncle = grandpa.L;
5211           if (uncle && uncle.C) {
5212             parent.C = uncle.C = false;
5213             grandpa.C = true;
5214             after = grandpa;
5215           } else {
5216             if (after === parent.L) {
5217               d3_geom_voronoiRedBlackRotateRight(this, parent);
5218               after = parent;
5219               parent = after.U;
5220             }
5221             parent.C = false;
5222             grandpa.C = true;
5223             d3_geom_voronoiRedBlackRotateLeft(this, grandpa);
5224           }
5225         }
5226         parent = after.U;
5227       }
5228       this._.C = false;
5229     },
5230     remove: function(node) {
5231       if (node.N) node.N.P = node.P;
5232       if (node.P) node.P.N = node.N;
5233       node.N = node.P = null;
5234       var parent = node.U, sibling, left = node.L, right = node.R, next, red;
5235       if (!left) next = right; else if (!right) next = left; else next = d3_geom_voronoiRedBlackFirst(right);
5236       if (parent) {
5237         if (parent.L === node) parent.L = next; else parent.R = next;
5238       } else {
5239         this._ = next;
5240       }
5241       if (left && right) {
5242         red = next.C;
5243         next.C = node.C;
5244         next.L = left;
5245         left.U = next;
5246         if (next !== right) {
5247           parent = next.U;
5248           next.U = node.U;
5249           node = next.R;
5250           parent.L = node;
5251           next.R = right;
5252           right.U = next;
5253         } else {
5254           next.U = parent;
5255           parent = next;
5256           node = next.R;
5257         }
5258       } else {
5259         red = node.C;
5260         node = next;
5261       }
5262       if (node) node.U = parent;
5263       if (red) return;
5264       if (node && node.C) {
5265         node.C = false;
5266         return;
5267       }
5268       do {
5269         if (node === this._) break;
5270         if (node === parent.L) {
5271           sibling = parent.R;
5272           if (sibling.C) {
5273             sibling.C = false;
5274             parent.C = true;
5275             d3_geom_voronoiRedBlackRotateLeft(this, parent);
5276             sibling = parent.R;
5277           }
5278           if (sibling.L && sibling.L.C || sibling.R && sibling.R.C) {
5279             if (!sibling.R || !sibling.R.C) {
5280               sibling.L.C = false;
5281               sibling.C = true;
5282               d3_geom_voronoiRedBlackRotateRight(this, sibling);
5283               sibling = parent.R;
5284             }
5285             sibling.C = parent.C;
5286             parent.C = sibling.R.C = false;
5287             d3_geom_voronoiRedBlackRotateLeft(this, parent);
5288             node = this._;
5289             break;
5290           }
5291         } else {
5292           sibling = parent.L;
5293           if (sibling.C) {
5294             sibling.C = false;
5295             parent.C = true;
5296             d3_geom_voronoiRedBlackRotateRight(this, parent);
5297             sibling = parent.L;
5298           }
5299           if (sibling.L && sibling.L.C || sibling.R && sibling.R.C) {
5300             if (!sibling.L || !sibling.L.C) {
5301               sibling.R.C = false;
5302               sibling.C = true;
5303               d3_geom_voronoiRedBlackRotateLeft(this, sibling);
5304               sibling = parent.L;
5305             }
5306             sibling.C = parent.C;
5307             parent.C = sibling.L.C = false;
5308             d3_geom_voronoiRedBlackRotateRight(this, parent);
5309             node = this._;
5310             break;
5311           }
5312         }
5313         sibling.C = true;
5314         node = parent;
5315         parent = parent.U;
5316       } while (!node.C);
5317       if (node) node.C = false;
5318     }
5319   };
5320   function d3_geom_voronoiRedBlackRotateLeft(tree, node) {
5321     var p = node, q = node.R, parent = p.U;
5322     if (parent) {
5323       if (parent.L === p) parent.L = q; else parent.R = q;
5324     } else {
5325       tree._ = q;
5326     }
5327     q.U = parent;
5328     p.U = q;
5329     p.R = q.L;
5330     if (p.R) p.R.U = p;
5331     q.L = p;
5332   }
5333   function d3_geom_voronoiRedBlackRotateRight(tree, node) {
5334     var p = node, q = node.L, parent = p.U;
5335     if (parent) {
5336       if (parent.L === p) parent.L = q; else parent.R = q;
5337     } else {
5338       tree._ = q;
5339     }
5340     q.U = parent;
5341     p.U = q;
5342     p.L = q.R;
5343     if (p.L) p.L.U = p;
5344     q.R = p;
5345   }
5346   function d3_geom_voronoiRedBlackFirst(node) {
5347     while (node.L) node = node.L;
5348     return node;
5349   }
5350   function d3_geom_voronoi(sites, bbox) {
5351     var site = sites.sort(d3_geom_voronoiVertexOrder).pop(), x0, y0, circle;
5352     d3_geom_voronoiEdges = [];
5353     d3_geom_voronoiCells = new Array(sites.length);
5354     d3_geom_voronoiBeaches = new d3_geom_voronoiRedBlackTree();
5355     d3_geom_voronoiCircles = new d3_geom_voronoiRedBlackTree();
5356     while (true) {
5357       circle = d3_geom_voronoiFirstCircle;
5358       if (site && (!circle || site.y < circle.y || site.y === circle.y && site.x < circle.x)) {
5359         if (site.x !== x0 || site.y !== y0) {
5360           d3_geom_voronoiCells[site.i] = new d3_geom_voronoiCell(site);
5361           d3_geom_voronoiAddBeach(site);
5362           x0 = site.x, y0 = site.y;
5363         }
5364         site = sites.pop();
5365       } else if (circle) {
5366         d3_geom_voronoiRemoveBeach(circle.arc);
5367       } else {
5368         break;
5369       }
5370     }
5371     if (bbox) d3_geom_voronoiClipEdges(bbox), d3_geom_voronoiCloseCells(bbox);
5372     var diagram = {
5373       cells: d3_geom_voronoiCells,
5374       edges: d3_geom_voronoiEdges
5375     };
5376     d3_geom_voronoiBeaches = d3_geom_voronoiCircles = d3_geom_voronoiEdges = d3_geom_voronoiCells = null;
5377     return diagram;
5378   }
5379   function d3_geom_voronoiVertexOrder(a, b) {
5380     return b.y - a.y || b.x - a.x;
5381   }
5382   d3.geom.voronoi = function(points) {
5383     var x = d3_geom_pointX, y = d3_geom_pointY, fx = x, fy = y, clipExtent = d3_geom_voronoiClipExtent;
5384     if (points) return voronoi(points);
5385     function voronoi(data) {
5386       var polygons = new Array(data.length), x0 = clipExtent[0][0], y0 = clipExtent[0][1], x1 = clipExtent[1][0], y1 = clipExtent[1][1];
5387       d3_geom_voronoi(sites(data), clipExtent).cells.forEach(function(cell, i) {
5388         var edges = cell.edges, site = cell.site, polygon = polygons[i] = edges.length ? edges.map(function(e) {
5389           var s = e.start();
5390           return [ s.x, s.y ];
5391         }) : site.x >= x0 && site.x <= x1 && site.y >= y0 && site.y <= y1 ? [ [ x0, y1 ], [ x1, y1 ], [ x1, y0 ], [ x0, y0 ] ] : [];
5392         polygon.point = data[i];
5393       });
5394       return polygons;
5395     }
5396     function sites(data) {
5397       return data.map(function(d, i) {
5398         return {
5399           x: Math.round(fx(d, i) / ε) * ε,
5400           y: Math.round(fy(d, i) / ε) * ε,
5401           i: i
5402         };
5403       });
5404     }
5405     voronoi.links = function(data) {
5406       return d3_geom_voronoi(sites(data)).edges.filter(function(edge) {
5407         return edge.l && edge.r;
5408       }).map(function(edge) {
5409         return {
5410           source: data[edge.l.i],
5411           target: data[edge.r.i]
5412         };
5413       });
5414     };
5415     voronoi.triangles = function(data) {
5416       var triangles = [];
5417       d3_geom_voronoi(sites(data)).cells.forEach(function(cell, i) {
5418         var site = cell.site, edges = cell.edges.sort(d3_geom_voronoiHalfEdgeOrder), j = -1, m = edges.length, e0, s0, e1 = edges[m - 1].edge, s1 = e1.l === site ? e1.r : e1.l;
5419         while (++j < m) {
5420           e0 = e1;
5421           s0 = s1;
5422           e1 = edges[j].edge;
5423           s1 = e1.l === site ? e1.r : e1.l;
5424           if (i < s0.i && i < s1.i && d3_geom_voronoiTriangleArea(site, s0, s1) < 0) {
5425             triangles.push([ data[i], data[s0.i], data[s1.i] ]);
5426           }
5427         }
5428       });
5429       return triangles;
5430     };
5431     voronoi.x = function(_) {
5432       return arguments.length ? (fx = d3_functor(x = _), voronoi) : x;
5433     };
5434     voronoi.y = function(_) {
5435       return arguments.length ? (fy = d3_functor(y = _), voronoi) : y;
5436     };
5437     voronoi.clipExtent = function(_) {
5438       if (!arguments.length) return clipExtent === d3_geom_voronoiClipExtent ? null : clipExtent;
5439       clipExtent = _ == null ? d3_geom_voronoiClipExtent : _;
5440       return voronoi;
5441     };
5442     voronoi.size = function(_) {
5443       if (!arguments.length) return clipExtent === d3_geom_voronoiClipExtent ? null : clipExtent && clipExtent[1];
5444       return voronoi.clipExtent(_ && [ [ 0, 0 ], _ ]);
5445     };
5446     return voronoi;
5447   };
5448   var d3_geom_voronoiClipExtent = [ [ -1e6, -1e6 ], [ 1e6, 1e6 ] ];
5449   function d3_geom_voronoiTriangleArea(a, b, c) {
5450     return (a.x - c.x) * (b.y - a.y) - (a.x - b.x) * (c.y - a.y);
5451   }
5452   d3.geom.delaunay = function(vertices) {
5453     return d3.geom.voronoi().triangles(vertices);
5454   };
5455   d3.geom.quadtree = function(points, x1, y1, x2, y2) {
5456     var x = d3_geom_pointX, y = d3_geom_pointY, compat;
5457     if (compat = arguments.length) {
5458       x = d3_geom_quadtreeCompatX;
5459       y = d3_geom_quadtreeCompatY;
5460       if (compat === 3) {
5461         y2 = y1;
5462         x2 = x1;
5463         y1 = x1 = 0;
5464       }
5465       return quadtree(points);
5466     }
5467     function quadtree(data) {
5468       var d, fx = d3_functor(x), fy = d3_functor(y), xs, ys, i, n, x1_, y1_, x2_, y2_;
5469       if (x1 != null) {
5470         x1_ = x1, y1_ = y1, x2_ = x2, y2_ = y2;
5471       } else {
5472         x2_ = y2_ = -(x1_ = y1_ = Infinity);
5473         xs = [], ys = [];
5474         n = data.length;
5475         if (compat) for (i = 0; i < n; ++i) {
5476           d = data[i];
5477           if (d.x < x1_) x1_ = d.x;
5478           if (d.y < y1_) y1_ = d.y;
5479           if (d.x > x2_) x2_ = d.x;
5480           if (d.y > y2_) y2_ = d.y;
5481           xs.push(d.x);
5482           ys.push(d.y);
5483         } else for (i = 0; i < n; ++i) {
5484           var x_ = +fx(d = data[i], i), y_ = +fy(d, i);
5485           if (x_ < x1_) x1_ = x_;
5486           if (y_ < y1_) y1_ = y_;
5487           if (x_ > x2_) x2_ = x_;
5488           if (y_ > y2_) y2_ = y_;
5489           xs.push(x_);
5490           ys.push(y_);
5491         }
5492       }
5493       var dx = x2_ - x1_, dy = y2_ - y1_;
5494       if (dx > dy) y2_ = y1_ + dx; else x2_ = x1_ + dy;
5495       function insert(n, d, x, y, x1, y1, x2, y2) {
5496         if (isNaN(x) || isNaN(y)) return;
5497         if (n.leaf) {
5498           var nx = n.x, ny = n.y;
5499           if (nx != null) {
5500             if (abs(nx - x) + abs(ny - y) < .01) {
5501               insertChild(n, d, x, y, x1, y1, x2, y2);
5502             } else {
5503               var nPoint = n.point;
5504               n.x = n.y = n.point = null;
5505               insertChild(n, nPoint, nx, ny, x1, y1, x2, y2);
5506               insertChild(n, d, x, y, x1, y1, x2, y2);
5507             }
5508           } else {
5509             n.x = x, n.y = y, n.point = d;
5510           }
5511         } else {
5512           insertChild(n, d, x, y, x1, y1, x2, y2);
5513         }
5514       }
5515       function insertChild(n, d, x, y, x1, y1, x2, y2) {
5516         var sx = (x1 + x2) * .5, sy = (y1 + y2) * .5, right = x >= sx, bottom = y >= sy, i = (bottom << 1) + right;
5517         n.leaf = false;
5518         n = n.nodes[i] || (n.nodes[i] = d3_geom_quadtreeNode());
5519         if (right) x1 = sx; else x2 = sx;
5520         if (bottom) y1 = sy; else y2 = sy;
5521         insert(n, d, x, y, x1, y1, x2, y2);
5522       }
5523       var root = d3_geom_quadtreeNode();
5524       root.add = function(d) {
5525         insert(root, d, +fx(d, ++i), +fy(d, i), x1_, y1_, x2_, y2_);
5526       };
5527       root.visit = function(f) {
5528         d3_geom_quadtreeVisit(f, root, x1_, y1_, x2_, y2_);
5529       };
5530       i = -1;
5531       if (x1 == null) {
5532         while (++i < n) {
5533           insert(root, data[i], xs[i], ys[i], x1_, y1_, x2_, y2_);
5534         }
5535         --i;
5536       } else data.forEach(root.add);
5537       xs = ys = data = d = null;
5538       return root;
5539     }
5540     quadtree.x = function(_) {
5541       return arguments.length ? (x = _, quadtree) : x;
5542     };
5543     quadtree.y = function(_) {
5544       return arguments.length ? (y = _, quadtree) : y;
5545     };
5546     quadtree.extent = function(_) {
5547       if (!arguments.length) return x1 == null ? null : [ [ x1, y1 ], [ x2, y2 ] ];
5548       if (_ == null) x1 = y1 = x2 = y2 = null; else x1 = +_[0][0], y1 = +_[0][1], x2 = +_[1][0],
5549       y2 = +_[1][1];
5550       return quadtree;
5551     };
5552     quadtree.size = function(_) {
5553       if (!arguments.length) return x1 == null ? null : [ x2 - x1, y2 - y1 ];
5554       if (_ == null) x1 = y1 = x2 = y2 = null; else x1 = y1 = 0, x2 = +_[0], y2 = +_[1];
5555       return quadtree;
5556     };
5557     return quadtree;
5558   };
5559   function d3_geom_quadtreeCompatX(d) {
5560     return d.x;
5561   }
5562   function d3_geom_quadtreeCompatY(d) {
5563     return d.y;
5564   }
5565   function d3_geom_quadtreeNode() {
5566     return {
5567       leaf: true,
5568       nodes: [],
5569       point: null,
5570       x: null,
5571       y: null
5572     };
5573   }
5574   function d3_geom_quadtreeVisit(f, node, x1, y1, x2, y2) {
5575     if (!f(node, x1, y1, x2, y2)) {
5576       var sx = (x1 + x2) * .5, sy = (y1 + y2) * .5, children = node.nodes;
5577       if (children[0]) d3_geom_quadtreeVisit(f, children[0], x1, y1, sx, sy);
5578       if (children[1]) d3_geom_quadtreeVisit(f, children[1], sx, y1, x2, sy);
5579       if (children[2]) d3_geom_quadtreeVisit(f, children[2], x1, sy, sx, y2);
5580       if (children[3]) d3_geom_quadtreeVisit(f, children[3], sx, sy, x2, y2);
5581     }
5582   }
5583   d3.interpolateRgb = d3_interpolateRgb;
5584   function d3_interpolateRgb(a, b) {
5585     a = d3.rgb(a);
5586     b = d3.rgb(b);
5587     var ar = a.r, ag = a.g, ab = a.b, br = b.r - ar, bg = b.g - ag, bb = b.b - ab;
5588     return function(t) {
5589       return "#" + d3_rgb_hex(Math.round(ar + br * t)) + d3_rgb_hex(Math.round(ag + bg * t)) + d3_rgb_hex(Math.round(ab + bb * t));
5590     };
5591   }
5592   d3.interpolateObject = d3_interpolateObject;
5593   function d3_interpolateObject(a, b) {
5594     var i = {}, c = {}, k;
5595     for (k in a) {
5596       if (k in b) {
5597         i[k] = d3_interpolate(a[k], b[k]);
5598       } else {
5599         c[k] = a[k];
5600       }
5601     }
5602     for (k in b) {
5603       if (!(k in a)) {
5604         c[k] = b[k];
5605       }
5606     }
5607     return function(t) {
5608       for (k in i) c[k] = i[k](t);
5609       return c;
5610     };
5611   }
5612   d3.interpolateNumber = d3_interpolateNumber;
5613   function d3_interpolateNumber(a, b) {
5614     b -= a = +a;
5615     return function(t) {
5616       return a + b * t;
5617     };
5618   }
5619   d3.interpolateString = d3_interpolateString;
5620   function d3_interpolateString(a, b) {
5621     var m, i, j, s0 = 0, s1 = 0, s = [], q = [], n, o;
5622     a = a + "", b = b + "";
5623     d3_interpolate_number.lastIndex = 0;
5624     for (i = 0; m = d3_interpolate_number.exec(b); ++i) {
5625       if (m.index) s.push(b.substring(s0, s1 = m.index));
5626       q.push({
5627         i: s.length,
5628         x: m[0]
5629       });
5630       s.push(null);
5631       s0 = d3_interpolate_number.lastIndex;
5632     }
5633     if (s0 < b.length) s.push(b.substring(s0));
5634     for (i = 0, n = q.length; (m = d3_interpolate_number.exec(a)) && i < n; ++i) {
5635       o = q[i];
5636       if (o.x == m[0]) {
5637         if (o.i) {
5638           if (s[o.i + 1] == null) {
5639             s[o.i - 1] += o.x;
5640             s.splice(o.i, 1);
5641             for (j = i + 1; j < n; ++j) q[j].i--;
5642           } else {
5643             s[o.i - 1] += o.x + s[o.i + 1];
5644             s.splice(o.i, 2);
5645             for (j = i + 1; j < n; ++j) q[j].i -= 2;
5646           }
5647         } else {
5648           if (s[o.i + 1] == null) {
5649             s[o.i] = o.x;
5650           } else {
5651             s[o.i] = o.x + s[o.i + 1];
5652             s.splice(o.i + 1, 1);
5653             for (j = i + 1; j < n; ++j) q[j].i--;
5654           }
5655         }
5656         q.splice(i, 1);
5657         n--;
5658         i--;
5659       } else {
5660         o.x = d3_interpolateNumber(parseFloat(m[0]), parseFloat(o.x));
5661       }
5662     }
5663     while (i < n) {
5664       o = q.pop();
5665       if (s[o.i + 1] == null) {
5666         s[o.i] = o.x;
5667       } else {
5668         s[o.i] = o.x + s[o.i + 1];
5669         s.splice(o.i + 1, 1);
5670       }
5671       n--;
5672     }
5673     if (s.length === 1) {
5674       return s[0] == null ? (o = q[0].x, function(t) {
5675         return o(t) + "";
5676       }) : function() {
5677         return b;
5678       };
5679     }
5680     return function(t) {
5681       for (i = 0; i < n; ++i) s[(o = q[i]).i] = o.x(t);
5682       return s.join("");
5683     };
5684   }
5685   var d3_interpolate_number = /[-+]?(?:\d+\.?\d*|\.?\d+)(?:[eE][-+]?\d+)?/g;
5686   d3.interpolate = d3_interpolate;
5687   function d3_interpolate(a, b) {
5688     var i = d3.interpolators.length, f;
5689     while (--i >= 0 && !(f = d3.interpolators[i](a, b))) ;
5690     return f;
5691   }
5692   d3.interpolators = [ function(a, b) {
5693     var t = typeof b;
5694     return (t === "string" ? d3_rgb_names.has(b) || /^(#|rgb\(|hsl\()/.test(b) ? d3_interpolateRgb : d3_interpolateString : b instanceof d3_Color ? d3_interpolateRgb : Array.isArray(b) ? d3_interpolateArray : t === "object" && isNaN(b) ? d3_interpolateObject : d3_interpolateNumber)(a, b);
5695   } ];
5696   d3.interpolateArray = d3_interpolateArray;
5697   function d3_interpolateArray(a, b) {
5698     var x = [], c = [], na = a.length, nb = b.length, n0 = Math.min(a.length, b.length), i;
5699     for (i = 0; i < n0; ++i) x.push(d3_interpolate(a[i], b[i]));
5700     for (;i < na; ++i) c[i] = a[i];
5701     for (;i < nb; ++i) c[i] = b[i];
5702     return function(t) {
5703       for (i = 0; i < n0; ++i) c[i] = x[i](t);
5704       return c;
5705     };
5706   }
5707   var d3_ease_default = function() {
5708     return d3_identity;
5709   };
5710   var d3_ease = d3.map({
5711     linear: d3_ease_default,
5712     poly: d3_ease_poly,
5713     quad: function() {
5714       return d3_ease_quad;
5715     },
5716     cubic: function() {
5717       return d3_ease_cubic;
5718     },
5719     sin: function() {
5720       return d3_ease_sin;
5721     },
5722     exp: function() {
5723       return d3_ease_exp;
5724     },
5725     circle: function() {
5726       return d3_ease_circle;
5727     },
5728     elastic: d3_ease_elastic,
5729     back: d3_ease_back,
5730     bounce: function() {
5731       return d3_ease_bounce;
5732     }
5733   });
5734   var d3_ease_mode = d3.map({
5735     "in": d3_identity,
5736     out: d3_ease_reverse,
5737     "in-out": d3_ease_reflect,
5738     "out-in": function(f) {
5739       return d3_ease_reflect(d3_ease_reverse(f));
5740     }
5741   });
5742   d3.ease = function(name) {
5743     var i = name.indexOf("-"), t = i >= 0 ? name.substring(0, i) : name, m = i >= 0 ? name.substring(i + 1) : "in";
5744     t = d3_ease.get(t) || d3_ease_default;
5745     m = d3_ease_mode.get(m) || d3_identity;
5746     return d3_ease_clamp(m(t.apply(null, d3_arraySlice.call(arguments, 1))));
5747   };
5748   function d3_ease_clamp(f) {
5749     return function(t) {
5750       return t <= 0 ? 0 : t >= 1 ? 1 : f(t);
5751     };
5752   }
5753   function d3_ease_reverse(f) {
5754     return function(t) {
5755       return 1 - f(1 - t);
5756     };
5757   }
5758   function d3_ease_reflect(f) {
5759     return function(t) {
5760       return .5 * (t < .5 ? f(2 * t) : 2 - f(2 - 2 * t));
5761     };
5762   }
5763   function d3_ease_quad(t) {
5764     return t * t;
5765   }
5766   function d3_ease_cubic(t) {
5767     return t * t * t;
5768   }
5769   function d3_ease_cubicInOut(t) {
5770     if (t <= 0) return 0;
5771     if (t >= 1) return 1;
5772     var t2 = t * t, t3 = t2 * t;
5773     return 4 * (t < .5 ? t3 : 3 * (t - t2) + t3 - .75);
5774   }
5775   function d3_ease_poly(e) {
5776     return function(t) {
5777       return Math.pow(t, e);
5778     };
5779   }
5780   function d3_ease_sin(t) {
5781     return 1 - Math.cos(t * halfπ);
5782   }
5783   function d3_ease_exp(t) {
5784     return Math.pow(2, 10 * (t - 1));
5785   }
5786   function d3_ease_circle(t) {
5787     return 1 - Math.sqrt(1 - t * t);
5788   }
5789   function d3_ease_elastic(a, p) {
5790     var s;
5791     if (arguments.length < 2) p = .45;
5792     if (arguments.length) s = p / τ * Math.asin(1 / a); else a = 1, s = p / 4;
5793     return function(t) {
5794       return 1 + a * Math.pow(2, -10 * t) * Math.sin((t - s) * τ / p);
5795     };
5796   }
5797   function d3_ease_back(s) {
5798     if (!s) s = 1.70158;
5799     return function(t) {
5800       return t * t * ((s + 1) * t - s);
5801     };
5802   }
5803   function d3_ease_bounce(t) {
5804     return t < 1 / 2.75 ? 7.5625 * t * t : t < 2 / 2.75 ? 7.5625 * (t -= 1.5 / 2.75) * t + .75 : t < 2.5 / 2.75 ? 7.5625 * (t -= 2.25 / 2.75) * t + .9375 : 7.5625 * (t -= 2.625 / 2.75) * t + .984375;
5805   }
5806   d3.interpolateHcl = d3_interpolateHcl;
5807   function d3_interpolateHcl(a, b) {
5808     a = d3.hcl(a);
5809     b = d3.hcl(b);
5810     var ah = a.h, ac = a.c, al = a.l, bh = b.h - ah, bc = b.c - ac, bl = b.l - al;
5811     if (isNaN(bc)) bc = 0, ac = isNaN(ac) ? b.c : ac;
5812     if (isNaN(bh)) bh = 0, ah = isNaN(ah) ? b.h : ah; else if (bh > 180) bh -= 360; else if (bh < -180) bh += 360;
5813     return function(t) {
5814       return d3_hcl_lab(ah + bh * t, ac + bc * t, al + bl * t) + "";
5815     };
5816   }
5817   d3.interpolateHsl = d3_interpolateHsl;
5818   function d3_interpolateHsl(a, b) {
5819     a = d3.hsl(a);
5820     b = d3.hsl(b);
5821     var ah = a.h, as = a.s, al = a.l, bh = b.h - ah, bs = b.s - as, bl = b.l - al;
5822     if (isNaN(bs)) bs = 0, as = isNaN(as) ? b.s : as;
5823     if (isNaN(bh)) bh = 0, ah = isNaN(ah) ? b.h : ah; else if (bh > 180) bh -= 360; else if (bh < -180) bh += 360;
5824     return function(t) {
5825       return d3_hsl_rgb(ah + bh * t, as + bs * t, al + bl * t) + "";
5826     };
5827   }
5828   d3.interpolateLab = d3_interpolateLab;
5829   function d3_interpolateLab(a, b) {
5830     a = d3.lab(a);
5831     b = d3.lab(b);
5832     var al = a.l, aa = a.a, ab = a.b, bl = b.l - al, ba = b.a - aa, bb = b.b - ab;
5833     return function(t) {
5834       return d3_lab_rgb(al + bl * t, aa + ba * t, ab + bb * t) + "";
5835     };
5836   }
5837   d3.interpolateRound = d3_interpolateRound;
5838   function d3_interpolateRound(a, b) {
5839     b -= a;
5840     return function(t) {
5841       return Math.round(a + b * t);
5842     };
5843   }
5844   d3.transform = function(string) {
5845     var g = d3_document.createElementNS(d3.ns.prefix.svg, "g");
5846     return (d3.transform = function(string) {
5847       if (string != null) {
5848         g.setAttribute("transform", string);
5849         var t = g.transform.baseVal.consolidate();
5850       }
5851       return new d3_transform(t ? t.matrix : d3_transformIdentity);
5852     })(string);
5853   };
5854   function d3_transform(m) {
5855     var r0 = [ m.a, m.b ], r1 = [ m.c, m.d ], kx = d3_transformNormalize(r0), kz = d3_transformDot(r0, r1), ky = d3_transformNormalize(d3_transformCombine(r1, r0, -kz)) || 0;
5856     if (r0[0] * r1[1] < r1[0] * r0[1]) {
5857       r0[0] *= -1;
5858       r0[1] *= -1;
5859       kx *= -1;
5860       kz *= -1;
5861     }
5862     this.rotate = (kx ? Math.atan2(r0[1], r0[0]) : Math.atan2(-r1[0], r1[1])) * d3_degrees;
5863     this.translate = [ m.e, m.f ];
5864     this.scale = [ kx, ky ];
5865     this.skew = ky ? Math.atan2(kz, ky) * d3_degrees : 0;
5866   }
5867   d3_transform.prototype.toString = function() {
5868     return "translate(" + this.translate + ")rotate(" + this.rotate + ")skewX(" + this.skew + ")scale(" + this.scale + ")";
5869   };
5870   function d3_transformDot(a, b) {
5871     return a[0] * b[0] + a[1] * b[1];
5872   }
5873   function d3_transformNormalize(a) {
5874     var k = Math.sqrt(d3_transformDot(a, a));
5875     if (k) {
5876       a[0] /= k;
5877       a[1] /= k;
5878     }
5879     return k;
5880   }
5881   function d3_transformCombine(a, b, k) {
5882     a[0] += k * b[0];
5883     a[1] += k * b[1];
5884     return a;
5885   }
5886   var d3_transformIdentity = {
5887     a: 1,
5888     b: 0,
5889     c: 0,
5890     d: 1,
5891     e: 0,
5892     f: 0
5893   };
5894   d3.interpolateTransform = d3_interpolateTransform;
5895   function d3_interpolateTransform(a, b) {
5896     var s = [], q = [], n, A = d3.transform(a), B = d3.transform(b), ta = A.translate, tb = B.translate, ra = A.rotate, rb = B.rotate, wa = A.skew, wb = B.skew, ka = A.scale, kb = B.scale;
5897     if (ta[0] != tb[0] || ta[1] != tb[1]) {
5898       s.push("translate(", null, ",", null, ")");
5899       q.push({
5900         i: 1,
5901         x: d3_interpolateNumber(ta[0], tb[0])
5902       }, {
5903         i: 3,
5904         x: d3_interpolateNumber(ta[1], tb[1])
5905       });
5906     } else if (tb[0] || tb[1]) {
5907       s.push("translate(" + tb + ")");
5908     } else {
5909       s.push("");
5910     }
5911     if (ra != rb) {
5912       if (ra - rb > 180) rb += 360; else if (rb - ra > 180) ra += 360;
5913       q.push({
5914         i: s.push(s.pop() + "rotate(", null, ")") - 2,
5915         x: d3_interpolateNumber(ra, rb)
5916       });
5917     } else if (rb) {
5918       s.push(s.pop() + "rotate(" + rb + ")");
5919     }
5920     if (wa != wb) {
5921       q.push({
5922         i: s.push(s.pop() + "skewX(", null, ")") - 2,
5923         x: d3_interpolateNumber(wa, wb)
5924       });
5925     } else if (wb) {
5926       s.push(s.pop() + "skewX(" + wb + ")");
5927     }
5928     if (ka[0] != kb[0] || ka[1] != kb[1]) {
5929       n = s.push(s.pop() + "scale(", null, ",", null, ")");
5930       q.push({
5931         i: n - 4,
5932         x: d3_interpolateNumber(ka[0], kb[0])
5933       }, {
5934         i: n - 2,
5935         x: d3_interpolateNumber(ka[1], kb[1])
5936       });
5937     } else if (kb[0] != 1 || kb[1] != 1) {
5938       s.push(s.pop() + "scale(" + kb + ")");
5939     }
5940     n = q.length;
5941     return function(t) {
5942       var i = -1, o;
5943       while (++i < n) s[(o = q[i]).i] = o.x(t);
5944       return s.join("");
5945     };
5946   }
5947   function d3_uninterpolateNumber(a, b) {
5948     b = b - (a = +a) ? 1 / (b - a) : 0;
5949     return function(x) {
5950       return (x - a) * b;
5951     };
5952   }
5953   function d3_uninterpolateClamp(a, b) {
5954     b = b - (a = +a) ? 1 / (b - a) : 0;
5955     return function(x) {
5956       return Math.max(0, Math.min(1, (x - a) * b));
5957     };
5958   }
5959   d3.layout = {};
5960   d3.layout.bundle = function() {
5961     return function(links) {
5962       var paths = [], i = -1, n = links.length;
5963       while (++i < n) paths.push(d3_layout_bundlePath(links[i]));
5964       return paths;
5965     };
5966   };
5967   function d3_layout_bundlePath(link) {
5968     var start = link.source, end = link.target, lca = d3_layout_bundleLeastCommonAncestor(start, end), points = [ start ];
5969     while (start !== lca) {
5970       start = start.parent;
5971       points.push(start);
5972     }
5973     var k = points.length;
5974     while (end !== lca) {
5975       points.splice(k, 0, end);
5976       end = end.parent;
5977     }
5978     return points;
5979   }
5980   function d3_layout_bundleAncestors(node) {
5981     var ancestors = [], parent = node.parent;
5982     while (parent != null) {
5983       ancestors.push(node);
5984       node = parent;
5985       parent = parent.parent;
5986     }
5987     ancestors.push(node);
5988     return ancestors;
5989   }
5990   function d3_layout_bundleLeastCommonAncestor(a, b) {
5991     if (a === b) return a;
5992     var aNodes = d3_layout_bundleAncestors(a), bNodes = d3_layout_bundleAncestors(b), aNode = aNodes.pop(), bNode = bNodes.pop(), sharedNode = null;
5993     while (aNode === bNode) {
5994       sharedNode = aNode;
5995       aNode = aNodes.pop();
5996       bNode = bNodes.pop();
5997     }
5998     return sharedNode;
5999   }
6000   d3.layout.chord = function() {
6001     var chord = {}, chords, groups, matrix, n, padding = 0, sortGroups, sortSubgroups, sortChords;
6002     function relayout() {
6003       var subgroups = {}, groupSums = [], groupIndex = d3.range(n), subgroupIndex = [], k, x, x0, i, j;
6004       chords = [];
6005       groups = [];
6006       k = 0, i = -1;
6007       while (++i < n) {
6008         x = 0, j = -1;
6009         while (++j < n) {
6010           x += matrix[i][j];
6011         }
6012         groupSums.push(x);
6013         subgroupIndex.push(d3.range(n));
6014         k += x;
6015       }
6016       if (sortGroups) {
6017         groupIndex.sort(function(a, b) {
6018           return sortGroups(groupSums[a], groupSums[b]);
6019         });
6020       }
6021       if (sortSubgroups) {
6022         subgroupIndex.forEach(function(d, i) {
6023           d.sort(function(a, b) {
6024             return sortSubgroups(matrix[i][a], matrix[i][b]);
6025           });
6026         });
6027       }
6028       k = (τ - padding * n) / k;
6029       x = 0, i = -1;
6030       while (++i < n) {
6031         x0 = x, j = -1;
6032         while (++j < n) {
6033           var di = groupIndex[i], dj = subgroupIndex[di][j], v = matrix[di][dj], a0 = x, a1 = x += v * k;
6034           subgroups[di + "-" + dj] = {
6035             index: di,
6036             subindex: dj,
6037             startAngle: a0,
6038             endAngle: a1,
6039             value: v
6040           };
6041         }
6042         groups[di] = {
6043           index: di,
6044           startAngle: x0,
6045           endAngle: x,
6046           value: (x - x0) / k
6047         };
6048         x += padding;
6049       }
6050       i = -1;
6051       while (++i < n) {
6052         j = i - 1;
6053         while (++j < n) {
6054           var source = subgroups[i + "-" + j], target = subgroups[j + "-" + i];
6055           if (source.value || target.value) {
6056             chords.push(source.value < target.value ? {
6057               source: target,
6058               target: source
6059             } : {
6060               source: source,
6061               target: target
6062             });
6063           }
6064         }
6065       }
6066       if (sortChords) resort();
6067     }
6068     function resort() {
6069       chords.sort(function(a, b) {
6070         return sortChords((a.source.value + a.target.value) / 2, (b.source.value + b.target.value) / 2);
6071       });
6072     }
6073     chord.matrix = function(x) {
6074       if (!arguments.length) return matrix;
6075       n = (matrix = x) && matrix.length;
6076       chords = groups = null;
6077       return chord;
6078     };
6079     chord.padding = function(x) {
6080       if (!arguments.length) return padding;
6081       padding = x;
6082       chords = groups = null;
6083       return chord;
6084     };
6085     chord.sortGroups = function(x) {
6086       if (!arguments.length) return sortGroups;
6087       sortGroups = x;
6088       chords = groups = null;
6089       return chord;
6090     };
6091     chord.sortSubgroups = function(x) {
6092       if (!arguments.length) return sortSubgroups;
6093       sortSubgroups = x;
6094       chords = null;
6095       return chord;
6096     };
6097     chord.sortChords = function(x) {
6098       if (!arguments.length) return sortChords;
6099       sortChords = x;
6100       if (chords) resort();
6101       return chord;
6102     };
6103     chord.chords = function() {
6104       if (!chords) relayout();
6105       return chords;
6106     };
6107     chord.groups = function() {
6108       if (!groups) relayout();
6109       return groups;
6110     };
6111     return chord;
6112   };
6113   d3.layout.force = function() {
6114     var force = {}, event = d3.dispatch("start", "tick", "end"), size = [ 1, 1 ], drag, alpha, friction = .9, linkDistance = d3_layout_forceLinkDistance, linkStrength = d3_layout_forceLinkStrength, charge = -30, chargeDistance2 = d3_layout_forceChargeDistance2, gravity = .1, theta2 = .64, nodes = [], links = [], distances, strengths, charges;
6115     function repulse(node) {
6116       return function(quad, x1, _, x2) {
6117         if (quad.point !== node) {
6118           var dx = quad.cx - node.x, dy = quad.cy - node.y, dw = x2 - x1, dn = dx * dx + dy * dy;
6119           if (dw * dw / theta2 < dn) {
6120             if (dn < chargeDistance2) {
6121               var k = quad.charge / dn;
6122               node.px -= dx * k;
6123               node.py -= dy * k;
6124             }
6125             return true;
6126           }
6127           if (quad.point && dn && dn < chargeDistance2) {
6128             var k = quad.pointCharge / dn;
6129             node.px -= dx * k;
6130             node.py -= dy * k;
6131           }
6132         }
6133         return !quad.charge;
6134       };
6135     }
6136     force.tick = function() {
6137       if ((alpha *= .99) < .005) {
6138         event.end({
6139           type: "end",
6140           alpha: alpha = 0
6141         });
6142         return true;
6143       }
6144       var n = nodes.length, m = links.length, q, i, o, s, t, l, k, x, y;
6145       for (i = 0; i < m; ++i) {
6146         o = links[i];
6147         s = o.source;
6148         t = o.target;
6149         x = t.x - s.x;
6150         y = t.y - s.y;
6151         if (l = x * x + y * y) {
6152           l = alpha * strengths[i] * ((l = Math.sqrt(l)) - distances[i]) / l;
6153           x *= l;
6154           y *= l;
6155           t.x -= x * (k = s.weight / (t.weight + s.weight));
6156           t.y -= y * k;
6157           s.x += x * (k = 1 - k);
6158           s.y += y * k;
6159         }
6160       }
6161       if (k = alpha * gravity) {
6162         x = size[0] / 2;
6163         y = size[1] / 2;
6164         i = -1;
6165         if (k) while (++i < n) {
6166           o = nodes[i];
6167           o.x += (x - o.x) * k;
6168           o.y += (y - o.y) * k;
6169         }
6170       }
6171       if (charge) {
6172         d3_layout_forceAccumulate(q = d3.geom.quadtree(nodes), alpha, charges);
6173         i = -1;
6174         while (++i < n) {
6175           if (!(o = nodes[i]).fixed) {
6176             q.visit(repulse(o));
6177           }
6178         }
6179       }
6180       i = -1;
6181       while (++i < n) {
6182         o = nodes[i];
6183         if (o.fixed) {
6184           o.x = o.px;
6185           o.y = o.py;
6186         } else {
6187           o.x -= (o.px - (o.px = o.x)) * friction;
6188           o.y -= (o.py - (o.py = o.y)) * friction;
6189         }
6190       }
6191       event.tick({
6192         type: "tick",
6193         alpha: alpha
6194       });
6195     };
6196     force.nodes = function(x) {
6197       if (!arguments.length) return nodes;
6198       nodes = x;
6199       return force;
6200     };
6201     force.links = function(x) {
6202       if (!arguments.length) return links;
6203       links = x;
6204       return force;
6205     };
6206     force.size = function(x) {
6207       if (!arguments.length) return size;
6208       size = x;
6209       return force;
6210     };
6211     force.linkDistance = function(x) {
6212       if (!arguments.length) return linkDistance;
6213       linkDistance = typeof x === "function" ? x : +x;
6214       return force;
6215     };
6216     force.distance = force.linkDistance;
6217     force.linkStrength = function(x) {
6218       if (!arguments.length) return linkStrength;
6219       linkStrength = typeof x === "function" ? x : +x;
6220       return force;
6221     };
6222     force.friction = function(x) {
6223       if (!arguments.length) return friction;
6224       friction = +x;
6225       return force;
6226     };
6227     force.charge = function(x) {
6228       if (!arguments.length) return charge;
6229       charge = typeof x === "function" ? x : +x;
6230       return force;
6231     };
6232     force.chargeDistance = function(x) {
6233       if (!arguments.length) return Math.sqrt(chargeDistance2);
6234       chargeDistance2 = x * x;
6235       return force;
6236     };
6237     force.gravity = function(x) {
6238       if (!arguments.length) return gravity;
6239       gravity = +x;
6240       return force;
6241     };
6242     force.theta = function(x) {
6243       if (!arguments.length) return Math.sqrt(theta2);
6244       theta2 = x * x;
6245       return force;
6246     };
6247     force.alpha = function(x) {
6248       if (!arguments.length) return alpha;
6249       x = +x;
6250       if (alpha) {
6251         if (x > 0) alpha = x; else alpha = 0;
6252       } else if (x > 0) {
6253         event.start({
6254           type: "start",
6255           alpha: alpha = x
6256         });
6257         d3.timer(force.tick);
6258       }
6259       return force;
6260     };
6261     force.start = function() {
6262       var i, n = nodes.length, m = links.length, w = size[0], h = size[1], neighbors, o;
6263       for (i = 0; i < n; ++i) {
6264         (o = nodes[i]).index = i;
6265         o.weight = 0;
6266       }
6267       for (i = 0; i < m; ++i) {
6268         o = links[i];
6269         if (typeof o.source == "number") o.source = nodes[o.source];
6270         if (typeof o.target == "number") o.target = nodes[o.target];
6271         ++o.source.weight;
6272         ++o.target.weight;
6273       }
6274       for (i = 0; i < n; ++i) {
6275         o = nodes[i];
6276         if (isNaN(o.x)) o.x = position("x", w);
6277         if (isNaN(o.y)) o.y = position("y", h);
6278         if (isNaN(o.px)) o.px = o.x;
6279         if (isNaN(o.py)) o.py = o.y;
6280       }
6281       distances = [];
6282       if (typeof linkDistance === "function") for (i = 0; i < m; ++i) distances[i] = +linkDistance.call(this, links[i], i); else for (i = 0; i < m; ++i) distances[i] = linkDistance;
6283       strengths = [];
6284       if (typeof linkStrength === "function") for (i = 0; i < m; ++i) strengths[i] = +linkStrength.call(this, links[i], i); else for (i = 0; i < m; ++i) strengths[i] = linkStrength;
6285       charges = [];
6286       if (typeof charge === "function") for (i = 0; i < n; ++i) charges[i] = +charge.call(this, nodes[i], i); else for (i = 0; i < n; ++i) charges[i] = charge;
6287       function position(dimension, size) {
6288         if (!neighbors) {
6289           neighbors = new Array(n);
6290           for (j = 0; j < n; ++j) {
6291             neighbors[j] = [];
6292           }
6293           for (j = 0; j < m; ++j) {
6294             var o = links[j];
6295             neighbors[o.source.index].push(o.target);
6296             neighbors[o.target.index].push(o.source);
6297           }
6298         }
6299         var candidates = neighbors[i], j = -1, m = candidates.length, x;
6300         while (++j < m) if (!isNaN(x = candidates[j][dimension])) return x;
6301         return Math.random() * size;
6302       }
6303       return force.resume();
6304     };
6305     force.resume = function() {
6306       return force.alpha(.1);
6307     };
6308     force.stop = function() {
6309       return force.alpha(0);
6310     };
6311     force.drag = function() {
6312       if (!drag) drag = d3.behavior.drag().origin(d3_identity).on("dragstart.force", d3_layout_forceDragstart).on("drag.force", dragmove).on("dragend.force", d3_layout_forceDragend);
6313       if (!arguments.length) return drag;
6314       this.on("mouseover.force", d3_layout_forceMouseover).on("mouseout.force", d3_layout_forceMouseout).call(drag);
6315     };
6316     function dragmove(d) {
6317       d.px = d3.event.x, d.py = d3.event.y;
6318       force.resume();
6319     }
6320     return d3.rebind(force, event, "on");
6321   };
6322   function d3_layout_forceDragstart(d) {
6323     d.fixed |= 2;
6324   }
6325   function d3_layout_forceDragend(d) {
6326     d.fixed &= ~6;
6327   }
6328   function d3_layout_forceMouseover(d) {
6329     d.fixed |= 4;
6330     d.px = d.x, d.py = d.y;
6331   }
6332   function d3_layout_forceMouseout(d) {
6333     d.fixed &= ~4;
6334   }
6335   function d3_layout_forceAccumulate(quad, alpha, charges) {
6336     var cx = 0, cy = 0;
6337     quad.charge = 0;
6338     if (!quad.leaf) {
6339       var nodes = quad.nodes, n = nodes.length, i = -1, c;
6340       while (++i < n) {
6341         c = nodes[i];
6342         if (c == null) continue;
6343         d3_layout_forceAccumulate(c, alpha, charges);
6344         quad.charge += c.charge;
6345         cx += c.charge * c.cx;
6346         cy += c.charge * c.cy;
6347       }
6348     }
6349     if (quad.point) {
6350       if (!quad.leaf) {
6351         quad.point.x += Math.random() - .5;
6352         quad.point.y += Math.random() - .5;
6353       }
6354       var k = alpha * charges[quad.point.index];
6355       quad.charge += quad.pointCharge = k;
6356       cx += k * quad.point.x;
6357       cy += k * quad.point.y;
6358     }
6359     quad.cx = cx / quad.charge;
6360     quad.cy = cy / quad.charge;
6361   }
6362   var d3_layout_forceLinkDistance = 20, d3_layout_forceLinkStrength = 1, d3_layout_forceChargeDistance2 = Infinity;
6363   d3.layout.hierarchy = function() {
6364     var sort = d3_layout_hierarchySort, children = d3_layout_hierarchyChildren, value = d3_layout_hierarchyValue;
6365     function recurse(node, depth, nodes) {
6366       var childs = children.call(hierarchy, node, depth);
6367       node.depth = depth;
6368       nodes.push(node);
6369       if (childs && (n = childs.length)) {
6370         var i = -1, n, c = node.children = new Array(n), v = 0, j = depth + 1, d;
6371         while (++i < n) {
6372           d = c[i] = recurse(childs[i], j, nodes);
6373           d.parent = node;
6374           v += d.value;
6375         }
6376         if (sort) c.sort(sort);
6377         if (value) node.value = v;
6378       } else {
6379         delete node.children;
6380         if (value) {
6381           node.value = +value.call(hierarchy, node, depth) || 0;
6382         }
6383       }
6384       return node;
6385     }
6386     function revalue(node, depth) {
6387       var children = node.children, v = 0;
6388       if (children && (n = children.length)) {
6389         var i = -1, n, j = depth + 1;
6390         while (++i < n) v += revalue(children[i], j);
6391       } else if (value) {
6392         v = +value.call(hierarchy, node, depth) || 0;
6393       }
6394       if (value) node.value = v;
6395       return v;
6396     }
6397     function hierarchy(d) {
6398       var nodes = [];
6399       recurse(d, 0, nodes);
6400       return nodes;
6401     }
6402     hierarchy.sort = function(x) {
6403       if (!arguments.length) return sort;
6404       sort = x;
6405       return hierarchy;
6406     };
6407     hierarchy.children = function(x) {
6408       if (!arguments.length) return children;
6409       children = x;
6410       return hierarchy;
6411     };
6412     hierarchy.value = function(x) {
6413       if (!arguments.length) return value;
6414       value = x;
6415       return hierarchy;
6416     };
6417     hierarchy.revalue = function(root) {
6418       revalue(root, 0);
6419       return root;
6420     };
6421     return hierarchy;
6422   };
6423   function d3_layout_hierarchyRebind(object, hierarchy) {
6424     d3.rebind(object, hierarchy, "sort", "children", "value");
6425     object.nodes = object;
6426     object.links = d3_layout_hierarchyLinks;
6427     return object;
6428   }
6429   function d3_layout_hierarchyChildren(d) {
6430     return d.children;
6431   }
6432   function d3_layout_hierarchyValue(d) {
6433     return d.value;
6434   }
6435   function d3_layout_hierarchySort(a, b) {
6436     return b.value - a.value;
6437   }
6438   function d3_layout_hierarchyLinks(nodes) {
6439     return d3.merge(nodes.map(function(parent) {
6440       return (parent.children || []).map(function(child) {
6441         return {
6442           source: parent,
6443           target: child
6444         };
6445       });
6446     }));
6447   }
6448   d3.layout.partition = function() {
6449     var hierarchy = d3.layout.hierarchy(), size = [ 1, 1 ];
6450     function position(node, x, dx, dy) {
6451       var children = node.children;
6452       node.x = x;
6453       node.y = node.depth * dy;
6454       node.dx = dx;
6455       node.dy = dy;
6456       if (children && (n = children.length)) {
6457         var i = -1, n, c, d;
6458         dx = node.value ? dx / node.value : 0;
6459         while (++i < n) {
6460           position(c = children[i], x, d = c.value * dx, dy);
6461           x += d;
6462         }
6463       }
6464     }
6465     function depth(node) {
6466       var children = node.children, d = 0;
6467       if (children && (n = children.length)) {
6468         var i = -1, n;
6469         while (++i < n) d = Math.max(d, depth(children[i]));
6470       }
6471       return 1 + d;
6472     }
6473     function partition(d, i) {
6474       var nodes = hierarchy.call(this, d, i);
6475       position(nodes[0], 0, size[0], size[1] / depth(nodes[0]));
6476       return nodes;
6477     }
6478     partition.size = function(x) {
6479       if (!arguments.length) return size;
6480       size = x;
6481       return partition;
6482     };
6483     return d3_layout_hierarchyRebind(partition, hierarchy);
6484   };
6485   d3.layout.pie = function() {
6486     var value = Number, sort = d3_layout_pieSortByValue, startAngle = 0, endAngle = τ;
6487     function pie(data) {
6488       var values = data.map(function(d, i) {
6489         return +value.call(pie, d, i);
6490       });
6491       var a = +(typeof startAngle === "function" ? startAngle.apply(this, arguments) : startAngle);
6492       var k = ((typeof endAngle === "function" ? endAngle.apply(this, arguments) : endAngle) - a) / d3.sum(values);
6493       var index = d3.range(data.length);
6494       if (sort != null) index.sort(sort === d3_layout_pieSortByValue ? function(i, j) {
6495         return values[j] - values[i];
6496       } : function(i, j) {
6497         return sort(data[i], data[j]);
6498       });
6499       var arcs = [];
6500       index.forEach(function(i) {
6501         var d;
6502         arcs[i] = {
6503           data: data[i],
6504           value: d = values[i],
6505           startAngle: a,
6506           endAngle: a += d * k
6507         };
6508       });
6509       return arcs;
6510     }
6511     pie.value = function(x) {
6512       if (!arguments.length) return value;
6513       value = x;
6514       return pie;
6515     };
6516     pie.sort = function(x) {
6517       if (!arguments.length) return sort;
6518       sort = x;
6519       return pie;
6520     };
6521     pie.startAngle = function(x) {
6522       if (!arguments.length) return startAngle;
6523       startAngle = x;
6524       return pie;
6525     };
6526     pie.endAngle = function(x) {
6527       if (!arguments.length) return endAngle;
6528       endAngle = x;
6529       return pie;
6530     };
6531     return pie;
6532   };
6533   var d3_layout_pieSortByValue = {};
6534   d3.layout.stack = function() {
6535     var values = d3_identity, order = d3_layout_stackOrderDefault, offset = d3_layout_stackOffsetZero, out = d3_layout_stackOut, x = d3_layout_stackX, y = d3_layout_stackY;
6536     function stack(data, index) {
6537       var series = data.map(function(d, i) {
6538         return values.call(stack, d, i);
6539       });
6540       var points = series.map(function(d) {
6541         return d.map(function(v, i) {
6542           return [ x.call(stack, v, i), y.call(stack, v, i) ];
6543         });
6544       });
6545       var orders = order.call(stack, points, index);
6546       series = d3.permute(series, orders);
6547       points = d3.permute(points, orders);
6548       var offsets = offset.call(stack, points, index);
6549       var n = series.length, m = series[0].length, i, j, o;
6550       for (j = 0; j < m; ++j) {
6551         out.call(stack, series[0][j], o = offsets[j], points[0][j][1]);
6552         for (i = 1; i < n; ++i) {
6553           out.call(stack, series[i][j], o += points[i - 1][j][1], points[i][j][1]);
6554         }
6555       }
6556       return data;
6557     }
6558     stack.values = function(x) {
6559       if (!arguments.length) return values;
6560       values = x;
6561       return stack;
6562     };
6563     stack.order = function(x) {
6564       if (!arguments.length) return order;
6565       order = typeof x === "function" ? x : d3_layout_stackOrders.get(x) || d3_layout_stackOrderDefault;
6566       return stack;
6567     };
6568     stack.offset = function(x) {
6569       if (!arguments.length) return offset;
6570       offset = typeof x === "function" ? x : d3_layout_stackOffsets.get(x) || d3_layout_stackOffsetZero;
6571       return stack;
6572     };
6573     stack.x = function(z) {
6574       if (!arguments.length) return x;
6575       x = z;
6576       return stack;
6577     };
6578     stack.y = function(z) {
6579       if (!arguments.length) return y;
6580       y = z;
6581       return stack;
6582     };
6583     stack.out = function(z) {
6584       if (!arguments.length) return out;
6585       out = z;
6586       return stack;
6587     };
6588     return stack;
6589   };
6590   function d3_layout_stackX(d) {
6591     return d.x;
6592   }
6593   function d3_layout_stackY(d) {
6594     return d.y;
6595   }
6596   function d3_layout_stackOut(d, y0, y) {
6597     d.y0 = y0;
6598     d.y = y;
6599   }
6600   var d3_layout_stackOrders = d3.map({
6601     "inside-out": function(data) {
6602       var n = data.length, i, j, max = data.map(d3_layout_stackMaxIndex), sums = data.map(d3_layout_stackReduceSum), index = d3.range(n).sort(function(a, b) {
6603         return max[a] - max[b];
6604       }), top = 0, bottom = 0, tops = [], bottoms = [];
6605       for (i = 0; i < n; ++i) {
6606         j = index[i];
6607         if (top < bottom) {
6608           top += sums[j];
6609           tops.push(j);
6610         } else {
6611           bottom += sums[j];
6612           bottoms.push(j);
6613         }
6614       }
6615       return bottoms.reverse().concat(tops);
6616     },
6617     reverse: function(data) {
6618       return d3.range(data.length).reverse();
6619     },
6620     "default": d3_layout_stackOrderDefault
6621   });
6622   var d3_layout_stackOffsets = d3.map({
6623     silhouette: function(data) {
6624       var n = data.length, m = data[0].length, sums = [], max = 0, i, j, o, y0 = [];
6625       for (j = 0; j < m; ++j) {
6626         for (i = 0, o = 0; i < n; i++) o += data[i][j][1];
6627         if (o > max) max = o;
6628         sums.push(o);
6629       }
6630       for (j = 0; j < m; ++j) {
6631         y0[j] = (max - sums[j]) / 2;
6632       }
6633       return y0;
6634     },
6635     wiggle: function(data) {
6636       var n = data.length, x = data[0], m = x.length, i, j, k, s1, s2, s3, dx, o, o0, y0 = [];
6637       y0[0] = o = o0 = 0;
6638       for (j = 1; j < m; ++j) {
6639         for (i = 0, s1 = 0; i < n; ++i) s1 += data[i][j][1];
6640         for (i = 0, s2 = 0, dx = x[j][0] - x[j - 1][0]; i < n; ++i) {
6641           for (k = 0, s3 = (data[i][j][1] - data[i][j - 1][1]) / (2 * dx); k < i; ++k) {
6642             s3 += (data[k][j][1] - data[k][j - 1][1]) / dx;
6643           }
6644           s2 += s3 * data[i][j][1];
6645         }
6646         y0[j] = o -= s1 ? s2 / s1 * dx : 0;
6647         if (o < o0) o0 = o;
6648       }
6649       for (j = 0; j < m; ++j) y0[j] -= o0;
6650       return y0;
6651     },
6652     expand: function(data) {
6653       var n = data.length, m = data[0].length, k = 1 / n, i, j, o, y0 = [];
6654       for (j = 0; j < m; ++j) {
6655         for (i = 0, o = 0; i < n; i++) o += data[i][j][1];
6656         if (o) for (i = 0; i < n; i++) data[i][j][1] /= o; else for (i = 0; i < n; i++) data[i][j][1] = k;
6657       }
6658       for (j = 0; j < m; ++j) y0[j] = 0;
6659       return y0;
6660     },
6661     zero: d3_layout_stackOffsetZero
6662   });
6663   function d3_layout_stackOrderDefault(data) {
6664     return d3.range(data.length);
6665   }
6666   function d3_layout_stackOffsetZero(data) {
6667     var j = -1, m = data[0].length, y0 = [];
6668     while (++j < m) y0[j] = 0;
6669     return y0;
6670   }
6671   function d3_layout_stackMaxIndex(array) {
6672     var i = 1, j = 0, v = array[0][1], k, n = array.length;
6673     for (;i < n; ++i) {
6674       if ((k = array[i][1]) > v) {
6675         j = i;
6676         v = k;
6677       }
6678     }
6679     return j;
6680   }
6681   function d3_layout_stackReduceSum(d) {
6682     return d.reduce(d3_layout_stackSum, 0);
6683   }
6684   function d3_layout_stackSum(p, d) {
6685     return p + d[1];
6686   }
6687   d3.layout.histogram = function() {
6688     var frequency = true, valuer = Number, ranger = d3_layout_histogramRange, binner = d3_layout_histogramBinSturges;
6689     function histogram(data, i) {
6690       var bins = [], values = data.map(valuer, this), range = ranger.call(this, values, i), thresholds = binner.call(this, range, values, i), bin, i = -1, n = values.length, m = thresholds.length - 1, k = frequency ? 1 : 1 / n, x;
6691       while (++i < m) {
6692         bin = bins[i] = [];
6693         bin.dx = thresholds[i + 1] - (bin.x = thresholds[i]);
6694         bin.y = 0;
6695       }
6696       if (m > 0) {
6697         i = -1;
6698         while (++i < n) {
6699           x = values[i];
6700           if (x >= range[0] && x <= range[1]) {
6701             bin = bins[d3.bisect(thresholds, x, 1, m) - 1];
6702             bin.y += k;
6703             bin.push(data[i]);
6704           }
6705         }
6706       }
6707       return bins;
6708     }
6709     histogram.value = function(x) {
6710       if (!arguments.length) return valuer;
6711       valuer = x;
6712       return histogram;
6713     };
6714     histogram.range = function(x) {
6715       if (!arguments.length) return ranger;
6716       ranger = d3_functor(x);
6717       return histogram;
6718     };
6719     histogram.bins = function(x) {
6720       if (!arguments.length) return binner;
6721       binner = typeof x === "number" ? function(range) {
6722         return d3_layout_histogramBinFixed(range, x);
6723       } : d3_functor(x);
6724       return histogram;
6725     };
6726     histogram.frequency = function(x) {
6727       if (!arguments.length) return frequency;
6728       frequency = !!x;
6729       return histogram;
6730     };
6731     return histogram;
6732   };
6733   function d3_layout_histogramBinSturges(range, values) {
6734     return d3_layout_histogramBinFixed(range, Math.ceil(Math.log(values.length) / Math.LN2 + 1));
6735   }
6736   function d3_layout_histogramBinFixed(range, n) {
6737     var x = -1, b = +range[0], m = (range[1] - b) / n, f = [];
6738     while (++x <= n) f[x] = m * x + b;
6739     return f;
6740   }
6741   function d3_layout_histogramRange(values) {
6742     return [ d3.min(values), d3.max(values) ];
6743   }
6744   d3.layout.tree = function() {
6745     var hierarchy = d3.layout.hierarchy().sort(null).value(null), separation = d3_layout_treeSeparation, size = [ 1, 1 ], nodeSize = false;
6746     function tree(d, i) {
6747       var nodes = hierarchy.call(this, d, i), root = nodes[0];
6748       function firstWalk(node, previousSibling) {
6749         var children = node.children, layout = node._tree;
6750         if (children && (n = children.length)) {
6751           var n, firstChild = children[0], previousChild, ancestor = firstChild, child, i = -1;
6752           while (++i < n) {
6753             child = children[i];
6754             firstWalk(child, previousChild);
6755             ancestor = apportion(child, previousChild, ancestor);
6756             previousChild = child;
6757           }
6758           d3_layout_treeShift(node);
6759           var midpoint = .5 * (firstChild._tree.prelim + child._tree.prelim);
6760           if (previousSibling) {
6761             layout.prelim = previousSibling._tree.prelim + separation(node, previousSibling);
6762             layout.mod = layout.prelim - midpoint;
6763           } else {
6764             layout.prelim = midpoint;
6765           }
6766         } else {
6767           if (previousSibling) {
6768             layout.prelim = previousSibling._tree.prelim + separation(node, previousSibling);
6769           }
6770         }
6771       }
6772       function secondWalk(node, x) {
6773         node.x = node._tree.prelim + x;
6774         var children = node.children;
6775         if (children && (n = children.length)) {
6776           var i = -1, n;
6777           x += node._tree.mod;
6778           while (++i < n) {
6779             secondWalk(children[i], x);
6780           }
6781         }
6782       }
6783       function apportion(node, previousSibling, ancestor) {
6784         if (previousSibling) {
6785           var vip = node, vop = node, vim = previousSibling, vom = node.parent.children[0], sip = vip._tree.mod, sop = vop._tree.mod, sim = vim._tree.mod, som = vom._tree.mod, shift;
6786           while (vim = d3_layout_treeRight(vim), vip = d3_layout_treeLeft(vip), vim && vip) {
6787             vom = d3_layout_treeLeft(vom);
6788             vop = d3_layout_treeRight(vop);
6789             vop._tree.ancestor = node;
6790             shift = vim._tree.prelim + sim - vip._tree.prelim - sip + separation(vim, vip);
6791             if (shift > 0) {
6792               d3_layout_treeMove(d3_layout_treeAncestor(vim, node, ancestor), node, shift);
6793               sip += shift;
6794               sop += shift;
6795             }
6796             sim += vim._tree.mod;
6797             sip += vip._tree.mod;
6798             som += vom._tree.mod;
6799             sop += vop._tree.mod;
6800           }
6801           if (vim && !d3_layout_treeRight(vop)) {
6802             vop._tree.thread = vim;
6803             vop._tree.mod += sim - sop;
6804           }
6805           if (vip && !d3_layout_treeLeft(vom)) {
6806             vom._tree.thread = vip;
6807             vom._tree.mod += sip - som;
6808             ancestor = node;
6809           }
6810         }
6811         return ancestor;
6812       }
6813       d3_layout_treeVisitAfter(root, function(node, previousSibling) {
6814         node._tree = {
6815           ancestor: node,
6816           prelim: 0,
6817           mod: 0,
6818           change: 0,
6819           shift: 0,
6820           number: previousSibling ? previousSibling._tree.number + 1 : 0
6821         };
6822       });
6823       firstWalk(root);
6824       secondWalk(root, -root._tree.prelim);
6825       var left = d3_layout_treeSearch(root, d3_layout_treeLeftmost), right = d3_layout_treeSearch(root, d3_layout_treeRightmost), deep = d3_layout_treeSearch(root, d3_layout_treeDeepest), x0 = left.x - separation(left, right) / 2, x1 = right.x + separation(right, left) / 2, y1 = deep.depth || 1;
6826       d3_layout_treeVisitAfter(root, nodeSize ? function(node) {
6827         node.x *= size[0];
6828         node.y = node.depth * size[1];
6829         delete node._tree;
6830       } : function(node) {
6831         node.x = (node.x - x0) / (x1 - x0) * size[0];
6832         node.y = node.depth / y1 * size[1];
6833         delete node._tree;
6834       });
6835       return nodes;
6836     }
6837     tree.separation = function(x) {
6838       if (!arguments.length) return separation;
6839       separation = x;
6840       return tree;
6841     };
6842     tree.size = function(x) {
6843       if (!arguments.length) return nodeSize ? null : size;
6844       nodeSize = (size = x) == null;
6845       return tree;
6846     };
6847     tree.nodeSize = function(x) {
6848       if (!arguments.length) return nodeSize ? size : null;
6849       nodeSize = (size = x) != null;
6850       return tree;
6851     };
6852     return d3_layout_hierarchyRebind(tree, hierarchy);
6853   };
6854   function d3_layout_treeSeparation(a, b) {
6855     return a.parent == b.parent ? 1 : 2;
6856   }
6857   function d3_layout_treeLeft(node) {
6858     var children = node.children;
6859     return children && children.length ? children[0] : node._tree.thread;
6860   }
6861   function d3_layout_treeRight(node) {
6862     var children = node.children, n;
6863     return children && (n = children.length) ? children[n - 1] : node._tree.thread;
6864   }
6865   function d3_layout_treeSearch(node, compare) {
6866     var children = node.children;
6867     if (children && (n = children.length)) {
6868       var child, n, i = -1;
6869       while (++i < n) {
6870         if (compare(child = d3_layout_treeSearch(children[i], compare), node) > 0) {
6871           node = child;
6872         }
6873       }
6874     }
6875     return node;
6876   }
6877   function d3_layout_treeRightmost(a, b) {
6878     return a.x - b.x;
6879   }
6880   function d3_layout_treeLeftmost(a, b) {
6881     return b.x - a.x;
6882   }
6883   function d3_layout_treeDeepest(a, b) {
6884     return a.depth - b.depth;
6885   }
6886   function d3_layout_treeVisitAfter(node, callback) {
6887     function visit(node, previousSibling) {
6888       var children = node.children;
6889       if (children && (n = children.length)) {
6890         var child, previousChild = null, i = -1, n;
6891         while (++i < n) {
6892           child = children[i];
6893           visit(child, previousChild);
6894           previousChild = child;
6895         }
6896       }
6897       callback(node, previousSibling);
6898     }
6899     visit(node, null);
6900   }
6901   function d3_layout_treeShift(node) {
6902     var shift = 0, change = 0, children = node.children, i = children.length, child;
6903     while (--i >= 0) {
6904       child = children[i]._tree;
6905       child.prelim += shift;
6906       child.mod += shift;
6907       shift += child.shift + (change += child.change);
6908     }
6909   }
6910   function d3_layout_treeMove(ancestor, node, shift) {
6911     ancestor = ancestor._tree;
6912     node = node._tree;
6913     var change = shift / (node.number - ancestor.number);
6914     ancestor.change += change;
6915     node.change -= change;
6916     node.shift += shift;
6917     node.prelim += shift;
6918     node.mod += shift;
6919   }
6920   function d3_layout_treeAncestor(vim, node, ancestor) {
6921     return vim._tree.ancestor.parent == node.parent ? vim._tree.ancestor : ancestor;
6922   }
6923   d3.layout.pack = function() {
6924     var hierarchy = d3.layout.hierarchy().sort(d3_layout_packSort), padding = 0, size = [ 1, 1 ], radius;
6925     function pack(d, i) {
6926       var nodes = hierarchy.call(this, d, i), root = nodes[0], w = size[0], h = size[1], r = radius == null ? Math.sqrt : typeof radius === "function" ? radius : function() {
6927         return radius;
6928       };
6929       root.x = root.y = 0;
6930       d3_layout_treeVisitAfter(root, function(d) {
6931         d.r = +r(d.value);
6932       });
6933       d3_layout_treeVisitAfter(root, d3_layout_packSiblings);
6934       if (padding) {
6935         var dr = padding * (radius ? 1 : Math.max(2 * root.r / w, 2 * root.r / h)) / 2;
6936         d3_layout_treeVisitAfter(root, function(d) {
6937           d.r += dr;
6938         });
6939         d3_layout_treeVisitAfter(root, d3_layout_packSiblings);
6940         d3_layout_treeVisitAfter(root, function(d) {
6941           d.r -= dr;
6942         });
6943       }
6944       d3_layout_packTransform(root, w / 2, h / 2, radius ? 1 : 1 / Math.max(2 * root.r / w, 2 * root.r / h));
6945       return nodes;
6946     }
6947     pack.size = function(_) {
6948       if (!arguments.length) return size;
6949       size = _;
6950       return pack;
6951     };
6952     pack.radius = function(_) {
6953       if (!arguments.length) return radius;
6954       radius = _ == null || typeof _ === "function" ? _ : +_;
6955       return pack;
6956     };
6957     pack.padding = function(_) {
6958       if (!arguments.length) return padding;
6959       padding = +_;
6960       return pack;
6961     };
6962     return d3_layout_hierarchyRebind(pack, hierarchy);
6963   };
6964   function d3_layout_packSort(a, b) {
6965     return a.value - b.value;
6966   }
6967   function d3_layout_packInsert(a, b) {
6968     var c = a._pack_next;
6969     a._pack_next = b;
6970     b._pack_prev = a;
6971     b._pack_next = c;
6972     c._pack_prev = b;
6973   }
6974   function d3_layout_packSplice(a, b) {
6975     a._pack_next = b;
6976     b._pack_prev = a;
6977   }
6978   function d3_layout_packIntersects(a, b) {
6979     var dx = b.x - a.x, dy = b.y - a.y, dr = a.r + b.r;
6980     return .999 * dr * dr > dx * dx + dy * dy;
6981   }
6982   function d3_layout_packSiblings(node) {
6983     if (!(nodes = node.children) || !(n = nodes.length)) return;
6984     var nodes, xMin = Infinity, xMax = -Infinity, yMin = Infinity, yMax = -Infinity, a, b, c, i, j, k, n;
6985     function bound(node) {
6986       xMin = Math.min(node.x - node.r, xMin);
6987       xMax = Math.max(node.x + node.r, xMax);
6988       yMin = Math.min(node.y - node.r, yMin);
6989       yMax = Math.max(node.y + node.r, yMax);
6990     }
6991     nodes.forEach(d3_layout_packLink);
6992     a = nodes[0];
6993     a.x = -a.r;
6994     a.y = 0;
6995     bound(a);
6996     if (n > 1) {
6997       b = nodes[1];
6998       b.x = b.r;
6999       b.y = 0;
7000       bound(b);
7001       if (n > 2) {
7002         c = nodes[2];
7003         d3_layout_packPlace(a, b, c);
7004         bound(c);
7005         d3_layout_packInsert(a, c);
7006         a._pack_prev = c;
7007         d3_layout_packInsert(c, b);
7008         b = a._pack_next;
7009         for (i = 3; i < n; i++) {
7010           d3_layout_packPlace(a, b, c = nodes[i]);
7011           var isect = 0, s1 = 1, s2 = 1;
7012           for (j = b._pack_next; j !== b; j = j._pack_next, s1++) {
7013             if (d3_layout_packIntersects(j, c)) {
7014               isect = 1;
7015               break;
7016             }
7017           }
7018           if (isect == 1) {
7019             for (k = a._pack_prev; k !== j._pack_prev; k = k._pack_prev, s2++) {
7020               if (d3_layout_packIntersects(k, c)) {
7021                 break;
7022               }
7023             }
7024           }
7025           if (isect) {
7026             if (s1 < s2 || s1 == s2 && b.r < a.r) d3_layout_packSplice(a, b = j); else d3_layout_packSplice(a = k, b);
7027             i--;
7028           } else {
7029             d3_layout_packInsert(a, c);
7030             b = c;
7031             bound(c);
7032           }
7033         }
7034       }
7035     }
7036     var cx = (xMin + xMax) / 2, cy = (yMin + yMax) / 2, cr = 0;
7037     for (i = 0; i < n; i++) {
7038       c = nodes[i];
7039       c.x -= cx;
7040       c.y -= cy;
7041       cr = Math.max(cr, c.r + Math.sqrt(c.x * c.x + c.y * c.y));
7042     }
7043     node.r = cr;
7044     nodes.forEach(d3_layout_packUnlink);
7045   }
7046   function d3_layout_packLink(node) {
7047     node._pack_next = node._pack_prev = node;
7048   }
7049   function d3_layout_packUnlink(node) {
7050     delete node._pack_next;
7051     delete node._pack_prev;
7052   }
7053   function d3_layout_packTransform(node, x, y, k) {
7054     var children = node.children;
7055     node.x = x += k * node.x;
7056     node.y = y += k * node.y;
7057     node.r *= k;
7058     if (children) {
7059       var i = -1, n = children.length;
7060       while (++i < n) d3_layout_packTransform(children[i], x, y, k);
7061     }
7062   }
7063   function d3_layout_packPlace(a, b, c) {
7064     var db = a.r + c.r, dx = b.x - a.x, dy = b.y - a.y;
7065     if (db && (dx || dy)) {
7066       var da = b.r + c.r, dc = dx * dx + dy * dy;
7067       da *= da;
7068       db *= db;
7069       var x = .5 + (db - da) / (2 * dc), y = Math.sqrt(Math.max(0, 2 * da * (db + dc) - (db -= dc) * db - da * da)) / (2 * dc);
7070       c.x = a.x + x * dx + y * dy;
7071       c.y = a.y + x * dy - y * dx;
7072     } else {
7073       c.x = a.x + db;
7074       c.y = a.y;
7075     }
7076   }
7077   d3.layout.cluster = function() {
7078     var hierarchy = d3.layout.hierarchy().sort(null).value(null), separation = d3_layout_treeSeparation, size = [ 1, 1 ], nodeSize = false;
7079     function cluster(d, i) {
7080       var nodes = hierarchy.call(this, d, i), root = nodes[0], previousNode, x = 0;
7081       d3_layout_treeVisitAfter(root, function(node) {
7082         var children = node.children;
7083         if (children && children.length) {
7084           node.x = d3_layout_clusterX(children);
7085           node.y = d3_layout_clusterY(children);
7086         } else {
7087           node.x = previousNode ? x += separation(node, previousNode) : 0;
7088           node.y = 0;
7089           previousNode = node;
7090         }
7091       });
7092       var left = d3_layout_clusterLeft(root), right = d3_layout_clusterRight(root), x0 = left.x - separation(left, right) / 2, x1 = right.x + separation(right, left) / 2;
7093       d3_layout_treeVisitAfter(root, nodeSize ? function(node) {
7094         node.x = (node.x - root.x) * size[0];
7095         node.y = (root.y - node.y) * size[1];
7096       } : function(node) {
7097         node.x = (node.x - x0) / (x1 - x0) * size[0];
7098         node.y = (1 - (root.y ? node.y / root.y : 1)) * size[1];
7099       });
7100       return nodes;
7101     }
7102     cluster.separation = function(x) {
7103       if (!arguments.length) return separation;
7104       separation = x;
7105       return cluster;
7106     };
7107     cluster.size = function(x) {
7108       if (!arguments.length) return nodeSize ? null : size;
7109       nodeSize = (size = x) == null;
7110       return cluster;
7111     };
7112     cluster.nodeSize = function(x) {
7113       if (!arguments.length) return nodeSize ? size : null;
7114       nodeSize = (size = x) != null;
7115       return cluster;
7116     };
7117     return d3_layout_hierarchyRebind(cluster, hierarchy);
7118   };
7119   function d3_layout_clusterY(children) {
7120     return 1 + d3.max(children, function(child) {
7121       return child.y;
7122     });
7123   }
7124   function d3_layout_clusterX(children) {
7125     return children.reduce(function(x, child) {
7126       return x + child.x;
7127     }, 0) / children.length;
7128   }
7129   function d3_layout_clusterLeft(node) {
7130     var children = node.children;
7131     return children && children.length ? d3_layout_clusterLeft(children[0]) : node;
7132   }
7133   function d3_layout_clusterRight(node) {
7134     var children = node.children, n;
7135     return children && (n = children.length) ? d3_layout_clusterRight(children[n - 1]) : node;
7136   }
7137   d3.layout.treemap = function() {
7138     var hierarchy = d3.layout.hierarchy(), round = Math.round, size = [ 1, 1 ], padding = null, pad = d3_layout_treemapPadNull, sticky = false, stickies, mode = "squarify", ratio = .5 * (1 + Math.sqrt(5));
7139     function scale(children, k) {
7140       var i = -1, n = children.length, child, area;
7141       while (++i < n) {
7142         area = (child = children[i]).value * (k < 0 ? 0 : k);
7143         child.area = isNaN(area) || area <= 0 ? 0 : area;
7144       }
7145     }
7146     function squarify(node) {
7147       var children = node.children;
7148       if (children && children.length) {
7149         var rect = pad(node), row = [], remaining = children.slice(), child, best = Infinity, score, u = mode === "slice" ? rect.dx : mode === "dice" ? rect.dy : mode === "slice-dice" ? node.depth & 1 ? rect.dy : rect.dx : Math.min(rect.dx, rect.dy), n;
7150         scale(remaining, rect.dx * rect.dy / node.value);
7151         row.area = 0;
7152         while ((n = remaining.length) > 0) {
7153           row.push(child = remaining[n - 1]);
7154           row.area += child.area;
7155           if (mode !== "squarify" || (score = worst(row, u)) <= best) {
7156             remaining.pop();
7157             best = score;
7158           } else {
7159             row.area -= row.pop().area;
7160             position(row, u, rect, false);
7161             u = Math.min(rect.dx, rect.dy);
7162             row.length = row.area = 0;
7163             best = Infinity;
7164           }
7165         }
7166         if (row.length) {
7167           position(row, u, rect, true);
7168           row.length = row.area = 0;
7169         }
7170         children.forEach(squarify);
7171       }
7172     }
7173     function stickify(node) {
7174       var children = node.children;
7175       if (children && children.length) {
7176         var rect = pad(node), remaining = children.slice(), child, row = [];
7177         scale(remaining, rect.dx * rect.dy / node.value);
7178         row.area = 0;
7179         while (child = remaining.pop()) {
7180           row.push(child);
7181           row.area += child.area;
7182           if (child.z != null) {
7183             position(row, child.z ? rect.dx : rect.dy, rect, !remaining.length);
7184             row.length = row.area = 0;
7185           }
7186         }
7187         children.forEach(stickify);
7188       }
7189     }
7190     function worst(row, u) {
7191       var s = row.area, r, rmax = 0, rmin = Infinity, i = -1, n = row.length;
7192       while (++i < n) {
7193         if (!(r = row[i].area)) continue;
7194         if (r < rmin) rmin = r;
7195         if (r > rmax) rmax = r;
7196       }
7197       s *= s;
7198       u *= u;
7199       return s ? Math.max(u * rmax * ratio / s, s / (u * rmin * ratio)) : Infinity;
7200     }
7201     function position(row, u, rect, flush) {
7202       var i = -1, n = row.length, x = rect.x, y = rect.y, v = u ? round(row.area / u) : 0, o;
7203       if (u == rect.dx) {
7204         if (flush || v > rect.dy) v = rect.dy;
7205         while (++i < n) {
7206           o = row[i];
7207           o.x = x;
7208           o.y = y;
7209           o.dy = v;
7210           x += o.dx = Math.min(rect.x + rect.dx - x, v ? round(o.area / v) : 0);
7211         }
7212         o.z = true;
7213         o.dx += rect.x + rect.dx - x;
7214         rect.y += v;
7215         rect.dy -= v;
7216       } else {
7217         if (flush || v > rect.dx) v = rect.dx;
7218         while (++i < n) {
7219           o = row[i];
7220           o.x = x;
7221           o.y = y;
7222           o.dx = v;
7223           y += o.dy = Math.min(rect.y + rect.dy - y, v ? round(o.area / v) : 0);
7224         }
7225         o.z = false;
7226         o.dy += rect.y + rect.dy - y;
7227         rect.x += v;
7228         rect.dx -= v;
7229       }
7230     }
7231     function treemap(d) {
7232       var nodes = stickies || hierarchy(d), root = nodes[0];
7233       root.x = 0;
7234       root.y = 0;
7235       root.dx = size[0];
7236       root.dy = size[1];
7237       if (stickies) hierarchy.revalue(root);
7238       scale([ root ], root.dx * root.dy / root.value);
7239       (stickies ? stickify : squarify)(root);
7240       if (sticky) stickies = nodes;
7241       return nodes;
7242     }
7243     treemap.size = function(x) {
7244       if (!arguments.length) return size;
7245       size = x;
7246       return treemap;
7247     };
7248     treemap.padding = function(x) {
7249       if (!arguments.length) return padding;
7250       function padFunction(node) {
7251         var p = x.call(treemap, node, node.depth);
7252         return p == null ? d3_layout_treemapPadNull(node) : d3_layout_treemapPad(node, typeof p === "number" ? [ p, p, p, p ] : p);
7253       }
7254       function padConstant(node) {
7255         return d3_layout_treemapPad(node, x);
7256       }
7257       var type;
7258       pad = (padding = x) == null ? d3_layout_treemapPadNull : (type = typeof x) === "function" ? padFunction : type === "number" ? (x = [ x, x, x, x ],
7259       padConstant) : padConstant;
7260       return treemap;
7261     };
7262     treemap.round = function(x) {
7263       if (!arguments.length) return round != Number;
7264       round = x ? Math.round : Number;
7265       return treemap;
7266     };
7267     treemap.sticky = function(x) {
7268       if (!arguments.length) return sticky;
7269       sticky = x;
7270       stickies = null;
7271       return treemap;
7272     };
7273     treemap.ratio = function(x) {
7274       if (!arguments.length) return ratio;
7275       ratio = x;
7276       return treemap;
7277     };
7278     treemap.mode = function(x) {
7279       if (!arguments.length) return mode;
7280       mode = x + "";
7281       return treemap;
7282     };
7283     return d3_layout_hierarchyRebind(treemap, hierarchy);
7284   };
7285   function d3_layout_treemapPadNull(node) {
7286     return {
7287       x: node.x,
7288       y: node.y,
7289       dx: node.dx,
7290       dy: node.dy
7291     };
7292   }
7293   function d3_layout_treemapPad(node, padding) {
7294     var x = node.x + padding[3], y = node.y + padding[0], dx = node.dx - padding[1] - padding[3], dy = node.dy - padding[0] - padding[2];
7295     if (dx < 0) {
7296       x += dx / 2;
7297       dx = 0;
7298     }
7299     if (dy < 0) {
7300       y += dy / 2;
7301       dy = 0;
7302     }
7303     return {
7304       x: x,
7305       y: y,
7306       dx: dx,
7307       dy: dy
7308     };
7309   }
7310   d3.random = {
7311     normal: function(µ, σ) {
7312       var n = arguments.length;
7313       if (n < 2) σ = 1;
7314       if (n < 1) µ = 0;
7315       return function() {
7316         var x, y, r;
7317         do {
7318           x = Math.random() * 2 - 1;
7319           y = Math.random() * 2 - 1;
7320           r = x * x + y * y;
7321         } while (!r || r > 1);
7322         return µ + σ * x * Math.sqrt(-2 * Math.log(r) / r);
7323       };
7324     },
7325     logNormal: function() {
7326       var random = d3.random.normal.apply(d3, arguments);
7327       return function() {
7328         return Math.exp(random());
7329       };
7330     },
7331     bates: function(m) {
7332       var random = d3.random.irwinHall(m);
7333       return function() {
7334         return random() / m;
7335       };
7336     },
7337     irwinHall: function(m) {
7338       return function() {
7339         for (var s = 0, j = 0; j < m; j++) s += Math.random();
7340         return s;
7341       };
7342     }
7343   };
7344   d3.scale = {};
7345   function d3_scaleExtent(domain) {
7346     var start = domain[0], stop = domain[domain.length - 1];
7347     return start < stop ? [ start, stop ] : [ stop, start ];
7348   }
7349   function d3_scaleRange(scale) {
7350     return scale.rangeExtent ? scale.rangeExtent() : d3_scaleExtent(scale.range());
7351   }
7352   function d3_scale_bilinear(domain, range, uninterpolate, interpolate) {
7353     var u = uninterpolate(domain[0], domain[1]), i = interpolate(range[0], range[1]);
7354     return function(x) {
7355       return i(u(x));
7356     };
7357   }
7358   function d3_scale_nice(domain, nice) {
7359     var i0 = 0, i1 = domain.length - 1, x0 = domain[i0], x1 = domain[i1], dx;
7360     if (x1 < x0) {
7361       dx = i0, i0 = i1, i1 = dx;
7362       dx = x0, x0 = x1, x1 = dx;
7363     }
7364     domain[i0] = nice.floor(x0);
7365     domain[i1] = nice.ceil(x1);
7366     return domain;
7367   }
7368   function d3_scale_niceStep(step) {
7369     return step ? {
7370       floor: function(x) {
7371         return Math.floor(x / step) * step;
7372       },
7373       ceil: function(x) {
7374         return Math.ceil(x / step) * step;
7375       }
7376     } : d3_scale_niceIdentity;
7377   }
7378   var d3_scale_niceIdentity = {
7379     floor: d3_identity,
7380     ceil: d3_identity
7381   };
7382   function d3_scale_polylinear(domain, range, uninterpolate, interpolate) {
7383     var u = [], i = [], j = 0, k = Math.min(domain.length, range.length) - 1;
7384     if (domain[k] < domain[0]) {
7385       domain = domain.slice().reverse();
7386       range = range.slice().reverse();
7387     }
7388     while (++j <= k) {
7389       u.push(uninterpolate(domain[j - 1], domain[j]));
7390       i.push(interpolate(range[j - 1], range[j]));
7391     }
7392     return function(x) {
7393       var j = d3.bisect(domain, x, 1, k) - 1;
7394       return i[j](u[j](x));
7395     };
7396   }
7397   d3.scale.linear = function() {
7398     return d3_scale_linear([ 0, 1 ], [ 0, 1 ], d3_interpolate, false);
7399   };
7400   function d3_scale_linear(domain, range, interpolate, clamp) {
7401     var output, input;
7402     function rescale() {
7403       var linear = Math.min(domain.length, range.length) > 2 ? d3_scale_polylinear : d3_scale_bilinear, uninterpolate = clamp ? d3_uninterpolateClamp : d3_uninterpolateNumber;
7404       output = linear(domain, range, uninterpolate, interpolate);
7405       input = linear(range, domain, uninterpolate, d3_interpolate);
7406       return scale;
7407     }
7408     function scale(x) {
7409       return output(x);
7410     }
7411     scale.invert = function(y) {
7412       return input(y);
7413     };
7414     scale.domain = function(x) {
7415       if (!arguments.length) return domain;
7416       domain = x.map(Number);
7417       return rescale();
7418     };
7419     scale.range = function(x) {
7420       if (!arguments.length) return range;
7421       range = x;
7422       return rescale();
7423     };
7424     scale.rangeRound = function(x) {
7425       return scale.range(x).interpolate(d3_interpolateRound);
7426     };
7427     scale.clamp = function(x) {
7428       if (!arguments.length) return clamp;
7429       clamp = x;
7430       return rescale();
7431     };
7432     scale.interpolate = function(x) {
7433       if (!arguments.length) return interpolate;
7434       interpolate = x;
7435       return rescale();
7436     };
7437     scale.ticks = function(m) {
7438       return d3_scale_linearTicks(domain, m);
7439     };
7440     scale.tickFormat = function(m, format) {
7441       return d3_scale_linearTickFormat(domain, m, format);
7442     };
7443     scale.nice = function(m) {
7444       d3_scale_linearNice(domain, m);
7445       return rescale();
7446     };
7447     scale.copy = function() {
7448       return d3_scale_linear(domain, range, interpolate, clamp);
7449     };
7450     return rescale();
7451   }
7452   function d3_scale_linearRebind(scale, linear) {
7453     return d3.rebind(scale, linear, "range", "rangeRound", "interpolate", "clamp");
7454   }
7455   function d3_scale_linearNice(domain, m) {
7456     return d3_scale_nice(domain, d3_scale_niceStep(d3_scale_linearTickRange(domain, m)[2]));
7457   }
7458   function d3_scale_linearTickRange(domain, m) {
7459     if (m == null) m = 10;
7460     var extent = d3_scaleExtent(domain), span = extent[1] - extent[0], step = Math.pow(10, Math.floor(Math.log(span / m) / Math.LN10)), err = m / span * step;
7461     if (err <= .15) step *= 10; else if (err <= .35) step *= 5; else if (err <= .75) step *= 2;
7462     extent[0] = Math.ceil(extent[0] / step) * step;
7463     extent[1] = Math.floor(extent[1] / step) * step + step * .5;
7464     extent[2] = step;
7465     return extent;
7466   }
7467   function d3_scale_linearTicks(domain, m) {
7468     return d3.range.apply(d3, d3_scale_linearTickRange(domain, m));
7469   }
7470   function d3_scale_linearTickFormat(domain, m, format) {
7471     var range = d3_scale_linearTickRange(domain, m);
7472     if (format) {
7473       var match = d3_format_re.exec(format);
7474       match.shift();
7475       if (match[8] === "s") {
7476         var prefix = d3.formatPrefix(Math.max(abs(range[0]), abs(range[1])));
7477         if (!match[7]) match[7] = "." + d3_scale_linearPrecision(prefix.scale(range[2]));
7478         match[8] = "f";
7479         format = d3.format(match.join(""));
7480         return function(d) {
7481           return format(prefix.scale(d)) + prefix.symbol;
7482         };
7483       }
7484       if (!match[7]) match[7] = "." + d3_scale_linearFormatPrecision(match[8], range);
7485       format = match.join("");
7486     } else {
7487       format = ",." + d3_scale_linearPrecision(range[2]) + "f";
7488     }
7489     return d3.format(format);
7490   }
7491   var d3_scale_linearFormatSignificant = {
7492     s: 1,
7493     g: 1,
7494     p: 1,
7495     r: 1,
7496     e: 1
7497   };
7498   function d3_scale_linearPrecision(value) {
7499     return -Math.floor(Math.log(value) / Math.LN10 + .01);
7500   }
7501   function d3_scale_linearFormatPrecision(type, range) {
7502     var p = d3_scale_linearPrecision(range[2]);
7503     return type in d3_scale_linearFormatSignificant ? Math.abs(p - d3_scale_linearPrecision(Math.max(abs(range[0]), abs(range[1])))) + +(type !== "e") : p - (type === "%") * 2;
7504   }
7505   d3.scale.log = function() {
7506     return d3_scale_log(d3.scale.linear().domain([ 0, 1 ]), 10, true, [ 1, 10 ]);
7507   };
7508   function d3_scale_log(linear, base, positive, domain) {
7509     function log(x) {
7510       return (positive ? Math.log(x < 0 ? 0 : x) : -Math.log(x > 0 ? 0 : -x)) / Math.log(base);
7511     }
7512     function pow(x) {
7513       return positive ? Math.pow(base, x) : -Math.pow(base, -x);
7514     }
7515     function scale(x) {
7516       return linear(log(x));
7517     }
7518     scale.invert = function(x) {
7519       return pow(linear.invert(x));
7520     };
7521     scale.domain = function(x) {
7522       if (!arguments.length) return domain;
7523       positive = x[0] >= 0;
7524       linear.domain((domain = x.map(Number)).map(log));
7525       return scale;
7526     };
7527     scale.base = function(_) {
7528       if (!arguments.length) return base;
7529       base = +_;
7530       linear.domain(domain.map(log));
7531       return scale;
7532     };
7533     scale.nice = function() {
7534       var niced = d3_scale_nice(domain.map(log), positive ? Math : d3_scale_logNiceNegative);
7535       linear.domain(niced);
7536       domain = niced.map(pow);
7537       return scale;
7538     };
7539     scale.ticks = function() {
7540       var extent = d3_scaleExtent(domain), ticks = [], u = extent[0], v = extent[1], i = Math.floor(log(u)), j = Math.ceil(log(v)), n = base % 1 ? 2 : base;
7541       if (isFinite(j - i)) {
7542         if (positive) {
7543           for (;i < j; i++) for (var k = 1; k < n; k++) ticks.push(pow(i) * k);
7544           ticks.push(pow(i));
7545         } else {
7546           ticks.push(pow(i));
7547           for (;i++ < j; ) for (var k = n - 1; k > 0; k--) ticks.push(pow(i) * k);
7548         }
7549         for (i = 0; ticks[i] < u; i++) {}
7550         for (j = ticks.length; ticks[j - 1] > v; j--) {}
7551         ticks = ticks.slice(i, j);
7552       }
7553       return ticks;
7554     };
7555     scale.tickFormat = function(n, format) {
7556       if (!arguments.length) return d3_scale_logFormat;
7557       if (arguments.length < 2) format = d3_scale_logFormat; else if (typeof format !== "function") format = d3.format(format);
7558       var k = Math.max(.1, n / scale.ticks().length), f = positive ? (e = 1e-12, Math.ceil) : (e = -1e-12,
7559       Math.floor), e;
7560       return function(d) {
7561         return d / pow(f(log(d) + e)) <= k ? format(d) : "";
7562       };
7563     };
7564     scale.copy = function() {
7565       return d3_scale_log(linear.copy(), base, positive, domain);
7566     };
7567     return d3_scale_linearRebind(scale, linear);
7568   }
7569   var d3_scale_logFormat = d3.format(".0e"), d3_scale_logNiceNegative = {
7570     floor: function(x) {
7571       return -Math.ceil(-x);
7572     },
7573     ceil: function(x) {
7574       return -Math.floor(-x);
7575     }
7576   };
7577   d3.scale.pow = function() {
7578     return d3_scale_pow(d3.scale.linear(), 1, [ 0, 1 ]);
7579   };
7580   function d3_scale_pow(linear, exponent, domain) {
7581     var powp = d3_scale_powPow(exponent), powb = d3_scale_powPow(1 / exponent);
7582     function scale(x) {
7583       return linear(powp(x));
7584     }
7585     scale.invert = function(x) {
7586       return powb(linear.invert(x));
7587     };
7588     scale.domain = function(x) {
7589       if (!arguments.length) return domain;
7590       linear.domain((domain = x.map(Number)).map(powp));
7591       return scale;
7592     };
7593     scale.ticks = function(m) {
7594       return d3_scale_linearTicks(domain, m);
7595     };
7596     scale.tickFormat = function(m, format) {
7597       return d3_scale_linearTickFormat(domain, m, format);
7598     };
7599     scale.nice = function(m) {
7600       return scale.domain(d3_scale_linearNice(domain, m));
7601     };
7602     scale.exponent = function(x) {
7603       if (!arguments.length) return exponent;
7604       powp = d3_scale_powPow(exponent = x);
7605       powb = d3_scale_powPow(1 / exponent);
7606       linear.domain(domain.map(powp));
7607       return scale;
7608     };
7609     scale.copy = function() {
7610       return d3_scale_pow(linear.copy(), exponent, domain);
7611     };
7612     return d3_scale_linearRebind(scale, linear);
7613   }
7614   function d3_scale_powPow(e) {
7615     return function(x) {
7616       return x < 0 ? -Math.pow(-x, e) : Math.pow(x, e);
7617     };
7618   }
7619   d3.scale.sqrt = function() {
7620     return d3.scale.pow().exponent(.5);
7621   };
7622   d3.scale.ordinal = function() {
7623     return d3_scale_ordinal([], {
7624       t: "range",
7625       a: [ [] ]
7626     });
7627   };
7628   function d3_scale_ordinal(domain, ranger) {
7629     var index, range, rangeBand;
7630     function scale(x) {
7631       return range[((index.get(x) || (ranger.t === "range" ? index.set(x, domain.push(x)) : NaN)) - 1) % range.length];
7632     }
7633     function steps(start, step) {
7634       return d3.range(domain.length).map(function(i) {
7635         return start + step * i;
7636       });
7637     }
7638     scale.domain = function(x) {
7639       if (!arguments.length) return domain;
7640       domain = [];
7641       index = new d3_Map();
7642       var i = -1, n = x.length, xi;
7643       while (++i < n) if (!index.has(xi = x[i])) index.set(xi, domain.push(xi));
7644       return scale[ranger.t].apply(scale, ranger.a);
7645     };
7646     scale.range = function(x) {
7647       if (!arguments.length) return range;
7648       range = x;
7649       rangeBand = 0;
7650       ranger = {
7651         t: "range",
7652         a: arguments
7653       };
7654       return scale;
7655     };
7656     scale.rangePoints = function(x, padding) {
7657       if (arguments.length < 2) padding = 0;
7658       var start = x[0], stop = x[1], step = (stop - start) / (Math.max(1, domain.length - 1) + padding);
7659       range = steps(domain.length < 2 ? (start + stop) / 2 : start + step * padding / 2, step);
7660       rangeBand = 0;
7661       ranger = {
7662         t: "rangePoints",
7663         a: arguments
7664       };
7665       return scale;
7666     };
7667     scale.rangeBands = function(x, padding, outerPadding) {
7668       if (arguments.length < 2) padding = 0;
7669       if (arguments.length < 3) outerPadding = padding;
7670       var reverse = x[1] < x[0], start = x[reverse - 0], stop = x[1 - reverse], step = (stop - start) / (domain.length - padding + 2 * outerPadding);
7671       range = steps(start + step * outerPadding, step);
7672       if (reverse) range.reverse();
7673       rangeBand = step * (1 - padding);
7674       ranger = {
7675         t: "rangeBands",
7676         a: arguments
7677       };
7678       return scale;
7679     };
7680     scale.rangeRoundBands = function(x, padding, outerPadding) {
7681       if (arguments.length < 2) padding = 0;
7682       if (arguments.length < 3) outerPadding = padding;
7683       var reverse = x[1] < x[0], start = x[reverse - 0], stop = x[1 - reverse], step = Math.floor((stop - start) / (domain.length - padding + 2 * outerPadding)), error = stop - start - (domain.length - padding) * step;
7684       range = steps(start + Math.round(error / 2), step);
7685       if (reverse) range.reverse();
7686       rangeBand = Math.round(step * (1 - padding));
7687       ranger = {
7688         t: "rangeRoundBands",
7689         a: arguments
7690       };
7691       return scale;
7692     };
7693     scale.rangeBand = function() {
7694       return rangeBand;
7695     };
7696     scale.rangeExtent = function() {
7697       return d3_scaleExtent(ranger.a[0]);
7698     };
7699     scale.copy = function() {
7700       return d3_scale_ordinal(domain, ranger);
7701     };
7702     return scale.domain(domain);
7703   }
7704   d3.scale.category10 = function() {
7705     return d3.scale.ordinal().range(d3_category10);
7706   };
7707   d3.scale.category20 = function() {
7708     return d3.scale.ordinal().range(d3_category20);
7709   };
7710   d3.scale.category20b = function() {
7711     return d3.scale.ordinal().range(d3_category20b);
7712   };
7713   d3.scale.category20c = function() {
7714     return d3.scale.ordinal().range(d3_category20c);
7715   };
7716   var d3_category10 = [ 2062260, 16744206, 2924588, 14034728, 9725885, 9197131, 14907330, 8355711, 12369186, 1556175 ].map(d3_rgbString);
7717   var d3_category20 = [ 2062260, 11454440, 16744206, 16759672, 2924588, 10018698, 14034728, 16750742, 9725885, 12955861, 9197131, 12885140, 14907330, 16234194, 8355711, 13092807, 12369186, 14408589, 1556175, 10410725 ].map(d3_rgbString);
7718   var d3_category20b = [ 3750777, 5395619, 7040719, 10264286, 6519097, 9216594, 11915115, 13556636, 9202993, 12426809, 15186514, 15190932, 8666169, 11356490, 14049643, 15177372, 8077683, 10834324, 13528509, 14589654 ].map(d3_rgbString);
7719   var d3_category20c = [ 3244733, 7057110, 10406625, 13032431, 15095053, 16616764, 16625259, 16634018, 3253076, 7652470, 10607003, 13101504, 7695281, 10394312, 12369372, 14342891, 6513507, 9868950, 12434877, 14277081 ].map(d3_rgbString);
7720   d3.scale.quantile = function() {
7721     return d3_scale_quantile([], []);
7722   };
7723   function d3_scale_quantile(domain, range) {
7724     var thresholds;
7725     function rescale() {
7726       var k = 0, q = range.length;
7727       thresholds = [];
7728       while (++k < q) thresholds[k - 1] = d3.quantile(domain, k / q);
7729       return scale;
7730     }
7731     function scale(x) {
7732       if (!isNaN(x = +x)) return range[d3.bisect(thresholds, x)];
7733     }
7734     scale.domain = function(x) {
7735       if (!arguments.length) return domain;
7736       domain = x.filter(function(d) {
7737         return !isNaN(d);
7738       }).sort(d3_ascending);
7739       return rescale();
7740     };
7741     scale.range = function(x) {
7742       if (!arguments.length) return range;
7743       range = x;
7744       return rescale();
7745     };
7746     scale.quantiles = function() {
7747       return thresholds;
7748     };
7749     scale.invertExtent = function(y) {
7750       y = range.indexOf(y);
7751       return y < 0 ? [ NaN, NaN ] : [ y > 0 ? thresholds[y - 1] : domain[0], y < thresholds.length ? thresholds[y] : domain[domain.length - 1] ];
7752     };
7753     scale.copy = function() {
7754       return d3_scale_quantile(domain, range);
7755     };
7756     return rescale();
7757   }
7758   d3.scale.quantize = function() {
7759     return d3_scale_quantize(0, 1, [ 0, 1 ]);
7760   };
7761   function d3_scale_quantize(x0, x1, range) {
7762     var kx, i;
7763     function scale(x) {
7764       return range[Math.max(0, Math.min(i, Math.floor(kx * (x - x0))))];
7765     }
7766     function rescale() {
7767       kx = range.length / (x1 - x0);
7768       i = range.length - 1;
7769       return scale;
7770     }
7771     scale.domain = function(x) {
7772       if (!arguments.length) return [ x0, x1 ];
7773       x0 = +x[0];
7774       x1 = +x[x.length - 1];
7775       return rescale();
7776     };
7777     scale.range = function(x) {
7778       if (!arguments.length) return range;
7779       range = x;
7780       return rescale();
7781     };
7782     scale.invertExtent = function(y) {
7783       y = range.indexOf(y);
7784       y = y < 0 ? NaN : y / kx + x0;
7785       return [ y, y + 1 / kx ];
7786     };
7787     scale.copy = function() {
7788       return d3_scale_quantize(x0, x1, range);
7789     };
7790     return rescale();
7791   }
7792   d3.scale.threshold = function() {
7793     return d3_scale_threshold([ .5 ], [ 0, 1 ]);
7794   };
7795   function d3_scale_threshold(domain, range) {
7796     function scale(x) {
7797       if (x <= x) return range[d3.bisect(domain, x)];
7798     }
7799     scale.domain = function(_) {
7800       if (!arguments.length) return domain;
7801       domain = _;
7802       return scale;
7803     };
7804     scale.range = function(_) {
7805       if (!arguments.length) return range;
7806       range = _;
7807       return scale;
7808     };
7809     scale.invertExtent = function(y) {
7810       y = range.indexOf(y);
7811       return [ domain[y - 1], domain[y] ];
7812     };
7813     scale.copy = function() {
7814       return d3_scale_threshold(domain, range);
7815     };
7816     return scale;
7817   }
7818   d3.scale.identity = function() {
7819     return d3_scale_identity([ 0, 1 ]);
7820   };
7821   function d3_scale_identity(domain) {
7822     function identity(x) {
7823       return +x;
7824     }
7825     identity.invert = identity;
7826     identity.domain = identity.range = function(x) {
7827       if (!arguments.length) return domain;
7828       domain = x.map(identity);
7829       return identity;
7830     };
7831     identity.ticks = function(m) {
7832       return d3_scale_linearTicks(domain, m);
7833     };
7834     identity.tickFormat = function(m, format) {
7835       return d3_scale_linearTickFormat(domain, m, format);
7836     };
7837     identity.copy = function() {
7838       return d3_scale_identity(domain);
7839     };
7840     return identity;
7841   }
7842   d3.svg = {};
7843   d3.svg.arc = function() {
7844     var innerRadius = d3_svg_arcInnerRadius, outerRadius = d3_svg_arcOuterRadius, startAngle = d3_svg_arcStartAngle, endAngle = d3_svg_arcEndAngle;
7845     function arc() {
7846       var r0 = innerRadius.apply(this, arguments), r1 = outerRadius.apply(this, arguments), a0 = startAngle.apply(this, arguments) + d3_svg_arcOffset, a1 = endAngle.apply(this, arguments) + d3_svg_arcOffset, da = (a1 < a0 && (da = a0,
7847       a0 = a1, a1 = da), a1 - a0), df = da < π ? "0" : "1", c0 = Math.cos(a0), s0 = Math.sin(a0), c1 = Math.cos(a1), s1 = Math.sin(a1);
7848       return da >= d3_svg_arcMax ? r0 ? "M0," + r1 + "A" + r1 + "," + r1 + " 0 1,1 0," + -r1 + "A" + r1 + "," + r1 + " 0 1,1 0," + r1 + "M0," + r0 + "A" + r0 + "," + r0 + " 0 1,0 0," + -r0 + "A" + r0 + "," + r0 + " 0 1,0 0," + r0 + "Z" : "M0," + r1 + "A" + r1 + "," + r1 + " 0 1,1 0," + -r1 + "A" + r1 + "," + r1 + " 0 1,1 0," + r1 + "Z" : r0 ? "M" + r1 * c0 + "," + r1 * s0 + "A" + r1 + "," + r1 + " 0 " + df + ",1 " + r1 * c1 + "," + r1 * s1 + "L" + r0 * c1 + "," + r0 * s1 + "A" + r0 + "," + r0 + " 0 " + df + ",0 " + r0 * c0 + "," + r0 * s0 + "Z" : "M" + r1 * c0 + "," + r1 * s0 + "A" + r1 + "," + r1 + " 0 " + df + ",1 " + r1 * c1 + "," + r1 * s1 + "L0,0" + "Z";
7849     }
7850     arc.innerRadius = function(v) {
7851       if (!arguments.length) return innerRadius;
7852       innerRadius = d3_functor(v);
7853       return arc;
7854     };
7855     arc.outerRadius = function(v) {
7856       if (!arguments.length) return outerRadius;
7857       outerRadius = d3_functor(v);
7858       return arc;
7859     };
7860     arc.startAngle = function(v) {
7861       if (!arguments.length) return startAngle;
7862       startAngle = d3_functor(v);
7863       return arc;
7864     };
7865     arc.endAngle = function(v) {
7866       if (!arguments.length) return endAngle;
7867       endAngle = d3_functor(v);
7868       return arc;
7869     };
7870     arc.centroid = function() {
7871       var r = (innerRadius.apply(this, arguments) + outerRadius.apply(this, arguments)) / 2, a = (startAngle.apply(this, arguments) + endAngle.apply(this, arguments)) / 2 + d3_svg_arcOffset;
7872       return [ Math.cos(a) * r, Math.sin(a) * r ];
7873     };
7874     return arc;
7875   };
7876   var d3_svg_arcOffset = -halfπ, d3_svg_arcMax = τ - ε;
7877   function d3_svg_arcInnerRadius(d) {
7878     return d.innerRadius;
7879   }
7880   function d3_svg_arcOuterRadius(d) {
7881     return d.outerRadius;
7882   }
7883   function d3_svg_arcStartAngle(d) {
7884     return d.startAngle;
7885   }
7886   function d3_svg_arcEndAngle(d) {
7887     return d.endAngle;
7888   }
7889   function d3_svg_line(projection) {
7890     var x = d3_geom_pointX, y = d3_geom_pointY, defined = d3_true, interpolate = d3_svg_lineLinear, interpolateKey = interpolate.key, tension = .7;
7891     function line(data) {
7892       var segments = [], points = [], i = -1, n = data.length, d, fx = d3_functor(x), fy = d3_functor(y);
7893       function segment() {
7894         segments.push("M", interpolate(projection(points), tension));
7895       }
7896       while (++i < n) {
7897         if (defined.call(this, d = data[i], i)) {
7898           points.push([ +fx.call(this, d, i), +fy.call(this, d, i) ]);
7899         } else if (points.length) {
7900           segment();
7901           points = [];
7902         }
7903       }
7904       if (points.length) segment();
7905       return segments.length ? segments.join("") : null;
7906     }
7907     line.x = function(_) {
7908       if (!arguments.length) return x;
7909       x = _;
7910       return line;
7911     };
7912     line.y = function(_) {
7913       if (!arguments.length) return y;
7914       y = _;
7915       return line;
7916     };
7917     line.defined = function(_) {
7918       if (!arguments.length) return defined;
7919       defined = _;
7920       return line;
7921     };
7922     line.interpolate = function(_) {
7923       if (!arguments.length) return interpolateKey;
7924       if (typeof _ === "function") interpolateKey = interpolate = _; else interpolateKey = (interpolate = d3_svg_lineInterpolators.get(_) || d3_svg_lineLinear).key;
7925       return line;
7926     };
7927     line.tension = function(_) {
7928       if (!arguments.length) return tension;
7929       tension = _;
7930       return line;
7931     };
7932     return line;
7933   }
7934   d3.svg.line = function() {
7935     return d3_svg_line(d3_identity);
7936   };
7937   var d3_svg_lineInterpolators = d3.map({
7938     linear: d3_svg_lineLinear,
7939     "linear-closed": d3_svg_lineLinearClosed,
7940     step: d3_svg_lineStep,
7941     "step-before": d3_svg_lineStepBefore,
7942     "step-after": d3_svg_lineStepAfter,
7943     basis: d3_svg_lineBasis,
7944     "basis-open": d3_svg_lineBasisOpen,
7945     "basis-closed": d3_svg_lineBasisClosed,
7946     bundle: d3_svg_lineBundle,
7947     cardinal: d3_svg_lineCardinal,
7948     "cardinal-open": d3_svg_lineCardinalOpen,
7949     "cardinal-closed": d3_svg_lineCardinalClosed,
7950     monotone: d3_svg_lineMonotone
7951   });
7952   d3_svg_lineInterpolators.forEach(function(key, value) {
7953     value.key = key;
7954     value.closed = /-closed$/.test(key);
7955   });
7956   function d3_svg_lineLinear(points) {
7957     return points.join("L");
7958   }
7959   function d3_svg_lineLinearClosed(points) {
7960     return d3_svg_lineLinear(points) + "Z";
7961   }
7962   function d3_svg_lineStep(points) {
7963     var i = 0, n = points.length, p = points[0], path = [ p[0], ",", p[1] ];
7964     while (++i < n) path.push("H", (p[0] + (p = points[i])[0]) / 2, "V", p[1]);
7965     if (n > 1) path.push("H", p[0]);
7966     return path.join("");
7967   }
7968   function d3_svg_lineStepBefore(points) {
7969     var i = 0, n = points.length, p = points[0], path = [ p[0], ",", p[1] ];
7970     while (++i < n) path.push("V", (p = points[i])[1], "H", p[0]);
7971     return path.join("");
7972   }
7973   function d3_svg_lineStepAfter(points) {
7974     var i = 0, n = points.length, p = points[0], path = [ p[0], ",", p[1] ];
7975     while (++i < n) path.push("H", (p = points[i])[0], "V", p[1]);
7976     return path.join("");
7977   }
7978   function d3_svg_lineCardinalOpen(points, tension) {
7979     return points.length < 4 ? d3_svg_lineLinear(points) : points[1] + d3_svg_lineHermite(points.slice(1, points.length - 1), d3_svg_lineCardinalTangents(points, tension));
7980   }
7981   function d3_svg_lineCardinalClosed(points, tension) {
7982     return points.length < 3 ? d3_svg_lineLinear(points) : points[0] + d3_svg_lineHermite((points.push(points[0]),
7983     points), d3_svg_lineCardinalTangents([ points[points.length - 2] ].concat(points, [ points[1] ]), tension));
7984   }
7985   function d3_svg_lineCardinal(points, tension) {
7986     return points.length < 3 ? d3_svg_lineLinear(points) : points[0] + d3_svg_lineHermite(points, d3_svg_lineCardinalTangents(points, tension));
7987   }
7988   function d3_svg_lineHermite(points, tangents) {
7989     if (tangents.length < 1 || points.length != tangents.length && points.length != tangents.length + 2) {
7990       return d3_svg_lineLinear(points);
7991     }
7992     var quad = points.length != tangents.length, path = "", p0 = points[0], p = points[1], t0 = tangents[0], t = t0, pi = 1;
7993     if (quad) {
7994       path += "Q" + (p[0] - t0[0] * 2 / 3) + "," + (p[1] - t0[1] * 2 / 3) + "," + p[0] + "," + p[1];
7995       p0 = points[1];
7996       pi = 2;
7997     }
7998     if (tangents.length > 1) {
7999       t = tangents[1];
8000       p = points[pi];
8001       pi++;
8002       path += "C" + (p0[0] + t0[0]) + "," + (p0[1] + t0[1]) + "," + (p[0] - t[0]) + "," + (p[1] - t[1]) + "," + p[0] + "," + p[1];
8003       for (var i = 2; i < tangents.length; i++, pi++) {
8004         p = points[pi];
8005         t = tangents[i];
8006         path += "S" + (p[0] - t[0]) + "," + (p[1] - t[1]) + "," + p[0] + "," + p[1];
8007       }
8008     }
8009     if (quad) {
8010       var lp = points[pi];
8011       path += "Q" + (p[0] + t[0] * 2 / 3) + "," + (p[1] + t[1] * 2 / 3) + "," + lp[0] + "," + lp[1];
8012     }
8013     return path;
8014   }
8015   function d3_svg_lineCardinalTangents(points, tension) {
8016     var tangents = [], a = (1 - tension) / 2, p0, p1 = points[0], p2 = points[1], i = 1, n = points.length;
8017     while (++i < n) {
8018       p0 = p1;
8019       p1 = p2;
8020       p2 = points[i];
8021       tangents.push([ a * (p2[0] - p0[0]), a * (p2[1] - p0[1]) ]);
8022     }
8023     return tangents;
8024   }
8025   function d3_svg_lineBasis(points) {
8026     if (points.length < 3) return d3_svg_lineLinear(points);
8027     var i = 1, n = points.length, pi = points[0], x0 = pi[0], y0 = pi[1], px = [ x0, x0, x0, (pi = points[1])[0] ], py = [ y0, y0, y0, pi[1] ], path = [ x0, ",", y0, "L", d3_svg_lineDot4(d3_svg_lineBasisBezier3, px), ",", d3_svg_lineDot4(d3_svg_lineBasisBezier3, py) ];
8028     points.push(points[n - 1]);
8029     while (++i <= n) {
8030       pi = points[i];
8031       px.shift();
8032       px.push(pi[0]);
8033       py.shift();
8034       py.push(pi[1]);
8035       d3_svg_lineBasisBezier(path, px, py);
8036     }
8037     points.pop();
8038     path.push("L", pi);
8039     return path.join("");
8040   }
8041   function d3_svg_lineBasisOpen(points) {
8042     if (points.length < 4) return d3_svg_lineLinear(points);
8043     var path = [], i = -1, n = points.length, pi, px = [ 0 ], py = [ 0 ];
8044     while (++i < 3) {
8045       pi = points[i];
8046       px.push(pi[0]);
8047       py.push(pi[1]);
8048     }
8049     path.push(d3_svg_lineDot4(d3_svg_lineBasisBezier3, px) + "," + d3_svg_lineDot4(d3_svg_lineBasisBezier3, py));
8050     --i;
8051     while (++i < n) {
8052       pi = points[i];
8053       px.shift();
8054       px.push(pi[0]);
8055       py.shift();
8056       py.push(pi[1]);
8057       d3_svg_lineBasisBezier(path, px, py);
8058     }
8059     return path.join("");
8060   }
8061   function d3_svg_lineBasisClosed(points) {
8062     var path, i = -1, n = points.length, m = n + 4, pi, px = [], py = [];
8063     while (++i < 4) {
8064       pi = points[i % n];
8065       px.push(pi[0]);
8066       py.push(pi[1]);
8067     }
8068     path = [ d3_svg_lineDot4(d3_svg_lineBasisBezier3, px), ",", d3_svg_lineDot4(d3_svg_lineBasisBezier3, py) ];
8069     --i;
8070     while (++i < m) {
8071       pi = points[i % n];
8072       px.shift();
8073       px.push(pi[0]);
8074       py.shift();
8075       py.push(pi[1]);
8076       d3_svg_lineBasisBezier(path, px, py);
8077     }
8078     return path.join("");
8079   }
8080   function d3_svg_lineBundle(points, tension) {
8081     var n = points.length - 1;
8082     if (n) {
8083       var x0 = points[0][0], y0 = points[0][1], dx = points[n][0] - x0, dy = points[n][1] - y0, i = -1, p, t;
8084       while (++i <= n) {
8085         p = points[i];
8086         t = i / n;
8087         p[0] = tension * p[0] + (1 - tension) * (x0 + t * dx);
8088         p[1] = tension * p[1] + (1 - tension) * (y0 + t * dy);
8089       }
8090     }
8091     return d3_svg_lineBasis(points);
8092   }
8093   function d3_svg_lineDot4(a, b) {
8094     return a[0] * b[0] + a[1] * b[1] + a[2] * b[2] + a[3] * b[3];
8095   }
8096   var d3_svg_lineBasisBezier1 = [ 0, 2 / 3, 1 / 3, 0 ], d3_svg_lineBasisBezier2 = [ 0, 1 / 3, 2 / 3, 0 ], d3_svg_lineBasisBezier3 = [ 0, 1 / 6, 2 / 3, 1 / 6 ];
8097   function d3_svg_lineBasisBezier(path, x, y) {
8098     path.push("C", d3_svg_lineDot4(d3_svg_lineBasisBezier1, x), ",", d3_svg_lineDot4(d3_svg_lineBasisBezier1, y), ",", d3_svg_lineDot4(d3_svg_lineBasisBezier2, x), ",", d3_svg_lineDot4(d3_svg_lineBasisBezier2, y), ",", d3_svg_lineDot4(d3_svg_lineBasisBezier3, x), ",", d3_svg_lineDot4(d3_svg_lineBasisBezier3, y));
8099   }
8100   function d3_svg_lineSlope(p0, p1) {
8101     return (p1[1] - p0[1]) / (p1[0] - p0[0]);
8102   }
8103   function d3_svg_lineFiniteDifferences(points) {
8104     var i = 0, j = points.length - 1, m = [], p0 = points[0], p1 = points[1], d = m[0] = d3_svg_lineSlope(p0, p1);
8105     while (++i < j) {
8106       m[i] = (d + (d = d3_svg_lineSlope(p0 = p1, p1 = points[i + 1]))) / 2;
8107     }
8108     m[i] = d;
8109     return m;
8110   }
8111   function d3_svg_lineMonotoneTangents(points) {
8112     var tangents = [], d, a, b, s, m = d3_svg_lineFiniteDifferences(points), i = -1, j = points.length - 1;
8113     while (++i < j) {
8114       d = d3_svg_lineSlope(points[i], points[i + 1]);
8115       if (abs(d) < ε) {
8116         m[i] = m[i + 1] = 0;
8117       } else {
8118         a = m[i] / d;
8119         b = m[i + 1] / d;
8120         s = a * a + b * b;
8121         if (s > 9) {
8122           s = d * 3 / Math.sqrt(s);
8123           m[i] = s * a;
8124           m[i + 1] = s * b;
8125         }
8126       }
8127     }
8128     i = -1;
8129     while (++i <= j) {
8130       s = (points[Math.min(j, i + 1)][0] - points[Math.max(0, i - 1)][0]) / (6 * (1 + m[i] * m[i]));
8131       tangents.push([ s || 0, m[i] * s || 0 ]);
8132     }
8133     return tangents;
8134   }
8135   function d3_svg_lineMonotone(points) {
8136     return points.length < 3 ? d3_svg_lineLinear(points) : points[0] + d3_svg_lineHermite(points, d3_svg_lineMonotoneTangents(points));
8137   }
8138   d3.svg.line.radial = function() {
8139     var line = d3_svg_line(d3_svg_lineRadial);
8140     line.radius = line.x, delete line.x;
8141     line.angle = line.y, delete line.y;
8142     return line;
8143   };
8144   function d3_svg_lineRadial(points) {
8145     var point, i = -1, n = points.length, r, a;
8146     while (++i < n) {
8147       point = points[i];
8148       r = point[0];
8149       a = point[1] + d3_svg_arcOffset;
8150       point[0] = r * Math.cos(a);
8151       point[1] = r * Math.sin(a);
8152     }
8153     return points;
8154   }
8155   function d3_svg_area(projection) {
8156     var x0 = d3_geom_pointX, x1 = d3_geom_pointX, y0 = 0, y1 = d3_geom_pointY, defined = d3_true, interpolate = d3_svg_lineLinear, interpolateKey = interpolate.key, interpolateReverse = interpolate, L = "L", tension = .7;
8157     function area(data) {
8158       var segments = [], points0 = [], points1 = [], i = -1, n = data.length, d, fx0 = d3_functor(x0), fy0 = d3_functor(y0), fx1 = x0 === x1 ? function() {
8159         return x;
8160       } : d3_functor(x1), fy1 = y0 === y1 ? function() {
8161         return y;
8162       } : d3_functor(y1), x, y;
8163       function segment() {
8164         segments.push("M", interpolate(projection(points1), tension), L, interpolateReverse(projection(points0.reverse()), tension), "Z");
8165       }
8166       while (++i < n) {
8167         if (defined.call(this, d = data[i], i)) {
8168           points0.push([ x = +fx0.call(this, d, i), y = +fy0.call(this, d, i) ]);
8169           points1.push([ +fx1.call(this, d, i), +fy1.call(this, d, i) ]);
8170         } else if (points0.length) {
8171           segment();
8172           points0 = [];
8173           points1 = [];
8174         }
8175       }
8176       if (points0.length) segment();
8177       return segments.length ? segments.join("") : null;
8178     }
8179     area.x = function(_) {
8180       if (!arguments.length) return x1;
8181       x0 = x1 = _;
8182       return area;
8183     };
8184     area.x0 = function(_) {
8185       if (!arguments.length) return x0;
8186       x0 = _;
8187       return area;
8188     };
8189     area.x1 = function(_) {
8190       if (!arguments.length) return x1;
8191       x1 = _;
8192       return area;
8193     };
8194     area.y = function(_) {
8195       if (!arguments.length) return y1;
8196       y0 = y1 = _;
8197       return area;
8198     };
8199     area.y0 = function(_) {
8200       if (!arguments.length) return y0;
8201       y0 = _;
8202       return area;
8203     };
8204     area.y1 = function(_) {
8205       if (!arguments.length) return y1;
8206       y1 = _;
8207       return area;
8208     };
8209     area.defined = function(_) {
8210       if (!arguments.length) return defined;
8211       defined = _;
8212       return area;
8213     };
8214     area.interpolate = function(_) {
8215       if (!arguments.length) return interpolateKey;
8216       if (typeof _ === "function") interpolateKey = interpolate = _; else interpolateKey = (interpolate = d3_svg_lineInterpolators.get(_) || d3_svg_lineLinear).key;
8217       interpolateReverse = interpolate.reverse || interpolate;
8218       L = interpolate.closed ? "M" : "L";
8219       return area;
8220     };
8221     area.tension = function(_) {
8222       if (!arguments.length) return tension;
8223       tension = _;
8224       return area;
8225     };
8226     return area;
8227   }
8228   d3_svg_lineStepBefore.reverse = d3_svg_lineStepAfter;
8229   d3_svg_lineStepAfter.reverse = d3_svg_lineStepBefore;
8230   d3.svg.area = function() {
8231     return d3_svg_area(d3_identity);
8232   };
8233   d3.svg.area.radial = function() {
8234     var area = d3_svg_area(d3_svg_lineRadial);
8235     area.radius = area.x, delete area.x;
8236     area.innerRadius = area.x0, delete area.x0;
8237     area.outerRadius = area.x1, delete area.x1;
8238     area.angle = area.y, delete area.y;
8239     area.startAngle = area.y0, delete area.y0;
8240     area.endAngle = area.y1, delete area.y1;
8241     return area;
8242   };
8243   d3.svg.chord = function() {
8244     var source = d3_source, target = d3_target, radius = d3_svg_chordRadius, startAngle = d3_svg_arcStartAngle, endAngle = d3_svg_arcEndAngle;
8245     function chord(d, i) {
8246       var s = subgroup(this, source, d, i), t = subgroup(this, target, d, i);
8247       return "M" + s.p0 + arc(s.r, s.p1, s.a1 - s.a0) + (equals(s, t) ? curve(s.r, s.p1, s.r, s.p0) : curve(s.r, s.p1, t.r, t.p0) + arc(t.r, t.p1, t.a1 - t.a0) + curve(t.r, t.p1, s.r, s.p0)) + "Z";
8248     }
8249     function subgroup(self, f, d, i) {
8250       var subgroup = f.call(self, d, i), r = radius.call(self, subgroup, i), a0 = startAngle.call(self, subgroup, i) + d3_svg_arcOffset, a1 = endAngle.call(self, subgroup, i) + d3_svg_arcOffset;
8251       return {
8252         r: r,
8253         a0: a0,
8254         a1: a1,
8255         p0: [ r * Math.cos(a0), r * Math.sin(a0) ],
8256         p1: [ r * Math.cos(a1), r * Math.sin(a1) ]
8257       };
8258     }
8259     function equals(a, b) {
8260       return a.a0 == b.a0 && a.a1 == b.a1;
8261     }
8262     function arc(r, p, a) {
8263       return "A" + r + "," + r + " 0 " + +(a > π) + ",1 " + p;
8264     }
8265     function curve(r0, p0, r1, p1) {
8266       return "Q 0,0 " + p1;
8267     }
8268     chord.radius = function(v) {
8269       if (!arguments.length) return radius;
8270       radius = d3_functor(v);
8271       return chord;
8272     };
8273     chord.source = function(v) {
8274       if (!arguments.length) return source;
8275       source = d3_functor(v);
8276       return chord;
8277     };
8278     chord.target = function(v) {
8279       if (!arguments.length) return target;
8280       target = d3_functor(v);
8281       return chord;
8282     };
8283     chord.startAngle = function(v) {
8284       if (!arguments.length) return startAngle;
8285       startAngle = d3_functor(v);
8286       return chord;
8287     };
8288     chord.endAngle = function(v) {
8289       if (!arguments.length) return endAngle;
8290       endAngle = d3_functor(v);
8291       return chord;
8292     };
8293     return chord;
8294   };
8295   function d3_svg_chordRadius(d) {
8296     return d.radius;
8297   }
8298   d3.svg.diagonal = function() {
8299     var source = d3_source, target = d3_target, projection = d3_svg_diagonalProjection;
8300     function diagonal(d, i) {
8301       var p0 = source.call(this, d, i), p3 = target.call(this, d, i), m = (p0.y + p3.y) / 2, p = [ p0, {
8302         x: p0.x,
8303         y: m
8304       }, {
8305         x: p3.x,
8306         y: m
8307       }, p3 ];
8308       p = p.map(projection);
8309       return "M" + p[0] + "C" + p[1] + " " + p[2] + " " + p[3];
8310     }
8311     diagonal.source = function(x) {
8312       if (!arguments.length) return source;
8313       source = d3_functor(x);
8314       return diagonal;
8315     };
8316     diagonal.target = function(x) {
8317       if (!arguments.length) return target;
8318       target = d3_functor(x);
8319       return diagonal;
8320     };
8321     diagonal.projection = function(x) {
8322       if (!arguments.length) return projection;
8323       projection = x;
8324       return diagonal;
8325     };
8326     return diagonal;
8327   };
8328   function d3_svg_diagonalProjection(d) {
8329     return [ d.x, d.y ];
8330   }
8331   d3.svg.diagonal.radial = function() {
8332     var diagonal = d3.svg.diagonal(), projection = d3_svg_diagonalProjection, projection_ = diagonal.projection;
8333     diagonal.projection = function(x) {
8334       return arguments.length ? projection_(d3_svg_diagonalRadialProjection(projection = x)) : projection;
8335     };
8336     return diagonal;
8337   };
8338   function d3_svg_diagonalRadialProjection(projection) {
8339     return function() {
8340       var d = projection.apply(this, arguments), r = d[0], a = d[1] + d3_svg_arcOffset;
8341       return [ r * Math.cos(a), r * Math.sin(a) ];
8342     };
8343   }
8344   d3.svg.symbol = function() {
8345     var type = d3_svg_symbolType, size = d3_svg_symbolSize;
8346     function symbol(d, i) {
8347       return (d3_svg_symbols.get(type.call(this, d, i)) || d3_svg_symbolCircle)(size.call(this, d, i));
8348     }
8349     symbol.type = function(x) {
8350       if (!arguments.length) return type;
8351       type = d3_functor(x);
8352       return symbol;
8353     };
8354     symbol.size = function(x) {
8355       if (!arguments.length) return size;
8356       size = d3_functor(x);
8357       return symbol;
8358     };
8359     return symbol;
8360   };
8361   function d3_svg_symbolSize() {
8362     return 64;
8363   }
8364   function d3_svg_symbolType() {
8365     return "circle";
8366   }
8367   function d3_svg_symbolCircle(size) {
8368     var r = Math.sqrt(size / π);
8369     return "M0," + r + "A" + r + "," + r + " 0 1,1 0," + -r + "A" + r + "," + r + " 0 1,1 0," + r + "Z";
8370   }
8371   var d3_svg_symbols = d3.map({
8372     circle: d3_svg_symbolCircle,
8373     cross: function(size) {
8374       var r = Math.sqrt(size / 5) / 2;
8375       return "M" + -3 * r + "," + -r + "H" + -r + "V" + -3 * r + "H" + r + "V" + -r + "H" + 3 * r + "V" + r + "H" + r + "V" + 3 * r + "H" + -r + "V" + r + "H" + -3 * r + "Z";
8376     },
8377     diamond: function(size) {
8378       var ry = Math.sqrt(size / (2 * d3_svg_symbolTan30)), rx = ry * d3_svg_symbolTan30;
8379       return "M0," + -ry + "L" + rx + ",0" + " 0," + ry + " " + -rx + ",0" + "Z";
8380     },
8381     square: function(size) {
8382       var r = Math.sqrt(size) / 2;
8383       return "M" + -r + "," + -r + "L" + r + "," + -r + " " + r + "," + r + " " + -r + "," + r + "Z";
8384     },
8385     "triangle-down": function(size) {
8386       var rx = Math.sqrt(size / d3_svg_symbolSqrt3), ry = rx * d3_svg_symbolSqrt3 / 2;
8387       return "M0," + ry + "L" + rx + "," + -ry + " " + -rx + "," + -ry + "Z";
8388     },
8389     "triangle-up": function(size) {
8390       var rx = Math.sqrt(size / d3_svg_symbolSqrt3), ry = rx * d3_svg_symbolSqrt3 / 2;
8391       return "M0," + -ry + "L" + rx + "," + ry + " " + -rx + "," + ry + "Z";
8392     }
8393   });
8394   d3.svg.symbolTypes = d3_svg_symbols.keys();
8395   var d3_svg_symbolSqrt3 = Math.sqrt(3), d3_svg_symbolTan30 = Math.tan(30 * d3_radians);
8396   function d3_transition(groups, id) {
8397     d3_subclass(groups, d3_transitionPrototype);
8398     groups.id = id;
8399     return groups;
8400   }
8401   var d3_transitionPrototype = [], d3_transitionId = 0, d3_transitionInheritId, d3_transitionInherit;
8402   d3_transitionPrototype.call = d3_selectionPrototype.call;
8403   d3_transitionPrototype.empty = d3_selectionPrototype.empty;
8404   d3_transitionPrototype.node = d3_selectionPrototype.node;
8405   d3_transitionPrototype.size = d3_selectionPrototype.size;
8406   d3.transition = function(selection) {
8407     return arguments.length ? d3_transitionInheritId ? selection.transition() : selection : d3_selectionRoot.transition();
8408   };
8409   d3.transition.prototype = d3_transitionPrototype;
8410   d3_transitionPrototype.select = function(selector) {
8411     var id = this.id, subgroups = [], subgroup, subnode, node;
8412     selector = d3_selection_selector(selector);
8413     for (var j = -1, m = this.length; ++j < m; ) {
8414       subgroups.push(subgroup = []);
8415       for (var group = this[j], i = -1, n = group.length; ++i < n; ) {
8416         if ((node = group[i]) && (subnode = selector.call(node, node.__data__, i, j))) {
8417           if ("__data__" in node) subnode.__data__ = node.__data__;
8418           d3_transitionNode(subnode, i, id, node.__transition__[id]);
8419           subgroup.push(subnode);
8420         } else {
8421           subgroup.push(null);
8422         }
8423       }
8424     }
8425     return d3_transition(subgroups, id);
8426   };
8427   d3_transitionPrototype.selectAll = function(selector) {
8428     var id = this.id, subgroups = [], subgroup, subnodes, node, subnode, transition;
8429     selector = d3_selection_selectorAll(selector);
8430     for (var j = -1, m = this.length; ++j < m; ) {
8431       for (var group = this[j], i = -1, n = group.length; ++i < n; ) {
8432         if (node = group[i]) {
8433           transition = node.__transition__[id];
8434           subnodes = selector.call(node, node.__data__, i, j);
8435           subgroups.push(subgroup = []);
8436           for (var k = -1, o = subnodes.length; ++k < o; ) {
8437             if (subnode = subnodes[k]) d3_transitionNode(subnode, k, id, transition);
8438             subgroup.push(subnode);
8439           }
8440         }
8441       }
8442     }
8443     return d3_transition(subgroups, id);
8444   };
8445   d3_transitionPrototype.filter = function(filter) {
8446     var subgroups = [], subgroup, group, node;
8447     if (typeof filter !== "function") filter = d3_selection_filter(filter);
8448     for (var j = 0, m = this.length; j < m; j++) {
8449       subgroups.push(subgroup = []);
8450       for (var group = this[j], i = 0, n = group.length; i < n; i++) {
8451         if ((node = group[i]) && filter.call(node, node.__data__, i, j)) {
8452           subgroup.push(node);
8453         }
8454       }
8455     }
8456     return d3_transition(subgroups, this.id);
8457   };
8458   d3_transitionPrototype.tween = function(name, tween) {
8459     var id = this.id;
8460     if (arguments.length < 2) return this.node().__transition__[id].tween.get(name);
8461     return d3_selection_each(this, tween == null ? function(node) {
8462       node.__transition__[id].tween.remove(name);
8463     } : function(node) {
8464       node.__transition__[id].tween.set(name, tween);
8465     });
8466   };
8467   function d3_transition_tween(groups, name, value, tween) {
8468     var id = groups.id;
8469     return d3_selection_each(groups, typeof value === "function" ? function(node, i, j) {
8470       node.__transition__[id].tween.set(name, tween(value.call(node, node.__data__, i, j)));
8471     } : (value = tween(value), function(node) {
8472       node.__transition__[id].tween.set(name, value);
8473     }));
8474   }
8475   d3_transitionPrototype.attr = function(nameNS, value) {
8476     if (arguments.length < 2) {
8477       for (value in nameNS) this.attr(value, nameNS[value]);
8478       return this;
8479     }
8480     var interpolate = nameNS == "transform" ? d3_interpolateTransform : d3_interpolate, name = d3.ns.qualify(nameNS);
8481     function attrNull() {
8482       this.removeAttribute(name);
8483     }
8484     function attrNullNS() {
8485       this.removeAttributeNS(name.space, name.local);
8486     }
8487     function attrTween(b) {
8488       return b == null ? attrNull : (b += "", function() {
8489         var a = this.getAttribute(name), i;
8490         return a !== b && (i = interpolate(a, b), function(t) {
8491           this.setAttribute(name, i(t));
8492         });
8493       });
8494     }
8495     function attrTweenNS(b) {
8496       return b == null ? attrNullNS : (b += "", function() {
8497         var a = this.getAttributeNS(name.space, name.local), i;
8498         return a !== b && (i = interpolate(a, b), function(t) {
8499           this.setAttributeNS(name.space, name.local, i(t));
8500         });
8501       });
8502     }
8503     return d3_transition_tween(this, "attr." + nameNS, value, name.local ? attrTweenNS : attrTween);
8504   };
8505   d3_transitionPrototype.attrTween = function(nameNS, tween) {
8506     var name = d3.ns.qualify(nameNS);
8507     function attrTween(d, i) {
8508       var f = tween.call(this, d, i, this.getAttribute(name));
8509       return f && function(t) {
8510         this.setAttribute(name, f(t));
8511       };
8512     }
8513     function attrTweenNS(d, i) {
8514       var f = tween.call(this, d, i, this.getAttributeNS(name.space, name.local));
8515       return f && function(t) {
8516         this.setAttributeNS(name.space, name.local, f(t));
8517       };
8518     }
8519     return this.tween("attr." + nameNS, name.local ? attrTweenNS : attrTween);
8520   };
8521   d3_transitionPrototype.style = function(name, value, priority) {
8522     var n = arguments.length;
8523     if (n < 3) {
8524       if (typeof name !== "string") {
8525         if (n < 2) value = "";
8526         for (priority in name) this.style(priority, name[priority], value);
8527         return this;
8528       }
8529       priority = "";
8530     }
8531     function styleNull() {
8532       this.style.removeProperty(name);
8533     }
8534     function styleString(b) {
8535       return b == null ? styleNull : (b += "", function() {
8536         var a = d3_window.getComputedStyle(this, null).getPropertyValue(name), i;
8537         return a !== b && (i = d3_interpolate(a, b), function(t) {
8538           this.style.setProperty(name, i(t), priority);
8539         });
8540       });
8541     }
8542     return d3_transition_tween(this, "style." + name, value, styleString);
8543   };
8544   d3_transitionPrototype.styleTween = function(name, tween, priority) {
8545     if (arguments.length < 3) priority = "";
8546     function styleTween(d, i) {
8547       var f = tween.call(this, d, i, d3_window.getComputedStyle(this, null).getPropertyValue(name));
8548       return f && function(t) {
8549         this.style.setProperty(name, f(t), priority);
8550       };
8551     }
8552     return this.tween("style." + name, styleTween);
8553   };
8554   d3_transitionPrototype.text = function(value) {
8555     return d3_transition_tween(this, "text", value, d3_transition_text);
8556   };
8557   function d3_transition_text(b) {
8558     if (b == null) b = "";
8559     return function() {
8560       this.textContent = b;
8561     };
8562   }
8563   d3_transitionPrototype.remove = function() {
8564     return this.each("end.transition", function() {
8565       var p;
8566       if (this.__transition__.count < 2 && (p = this.parentNode)) p.removeChild(this);
8567     });
8568   };
8569   d3_transitionPrototype.ease = function(value) {
8570     var id = this.id;
8571     if (arguments.length < 1) return this.node().__transition__[id].ease;
8572     if (typeof value !== "function") value = d3.ease.apply(d3, arguments);
8573     return d3_selection_each(this, function(node) {
8574       node.__transition__[id].ease = value;
8575     });
8576   };
8577   d3_transitionPrototype.delay = function(value) {
8578     var id = this.id;
8579     if (arguments.length < 1) return this.node().__transition__[id].delay;
8580     return d3_selection_each(this, typeof value === "function" ? function(node, i, j) {
8581       node.__transition__[id].delay = +value.call(node, node.__data__, i, j);
8582     } : (value = +value, function(node) {
8583       node.__transition__[id].delay = value;
8584     }));
8585   };
8586   d3_transitionPrototype.duration = function(value) {
8587     var id = this.id;
8588     if (arguments.length < 1) return this.node().__transition__[id].duration;
8589     return d3_selection_each(this, typeof value === "function" ? function(node, i, j) {
8590       node.__transition__[id].duration = Math.max(1, value.call(node, node.__data__, i, j));
8591     } : (value = Math.max(1, value), function(node) {
8592       node.__transition__[id].duration = value;
8593     }));
8594   };
8595   d3_transitionPrototype.each = function(type, listener) {
8596     var id = this.id;
8597     if (arguments.length < 2) {
8598       var inherit = d3_transitionInherit, inheritId = d3_transitionInheritId;
8599       d3_transitionInheritId = id;
8600       d3_selection_each(this, function(node, i, j) {
8601         d3_transitionInherit = node.__transition__[id];
8602         type.call(node, node.__data__, i, j);
8603       });
8604       d3_transitionInherit = inherit;
8605       d3_transitionInheritId = inheritId;
8606     } else {
8607       d3_selection_each(this, function(node) {
8608         var transition = node.__transition__[id];
8609         (transition.event || (transition.event = d3.dispatch("start", "end"))).on(type, listener);
8610       });
8611     }
8612     return this;
8613   };
8614   d3_transitionPrototype.transition = function() {
8615     var id0 = this.id, id1 = ++d3_transitionId, subgroups = [], subgroup, group, node, transition;
8616     for (var j = 0, m = this.length; j < m; j++) {
8617       subgroups.push(subgroup = []);
8618       for (var group = this[j], i = 0, n = group.length; i < n; i++) {
8619         if (node = group[i]) {
8620           transition = Object.create(node.__transition__[id0]);
8621           transition.delay += transition.duration;
8622           d3_transitionNode(node, i, id1, transition);
8623         }
8624         subgroup.push(node);
8625       }
8626     }
8627     return d3_transition(subgroups, id1);
8628   };
8629   function d3_transitionNode(node, i, id, inherit) {
8630     var lock = node.__transition__ || (node.__transition__ = {
8631       active: 0,
8632       count: 0
8633     }), transition = lock[id];
8634     if (!transition) {
8635       var time = inherit.time;
8636       transition = lock[id] = {
8637         tween: new d3_Map(),
8638         time: time,
8639         ease: inherit.ease,
8640         delay: inherit.delay,
8641         duration: inherit.duration
8642       };
8643       ++lock.count;
8644       d3.timer(function(elapsed) {
8645         var d = node.__data__, ease = transition.ease, delay = transition.delay, duration = transition.duration, timer = d3_timer_active, tweened = [];
8646         timer.t = delay + time;
8647         if (delay <= elapsed) return start(elapsed - delay);
8648         timer.c = start;
8649         function start(elapsed) {
8650           if (lock.active > id) return stop();
8651           lock.active = id;
8652           transition.event && transition.event.start.call(node, d, i);
8653           transition.tween.forEach(function(key, value) {
8654             if (value = value.call(node, d, i)) {
8655               tweened.push(value);
8656             }
8657           });
8658           d3.timer(function() {
8659             timer.c = tick(elapsed || 1) ? d3_true : tick;
8660             return 1;
8661           }, 0, time);
8662         }
8663         function tick(elapsed) {
8664           if (lock.active !== id) return stop();
8665           var t = elapsed / duration, e = ease(t), n = tweened.length;
8666           while (n > 0) {
8667             tweened[--n].call(node, e);
8668           }
8669           if (t >= 1) {
8670             transition.event && transition.event.end.call(node, d, i);
8671             return stop();
8672           }
8673         }
8674         function stop() {
8675           if (--lock.count) delete lock[id]; else delete node.__transition__;
8676           return 1;
8677         }
8678       }, 0, time);
8679     }
8680   }
8681   d3.svg.axis = function() {
8682     var scale = d3.scale.linear(), orient = d3_svg_axisDefaultOrient, innerTickSize = 6, outerTickSize = 6, tickPadding = 3, tickArguments_ = [ 10 ], tickValues = null, tickFormat_;
8683     function axis(g) {
8684       g.each(function() {
8685         var g = d3.select(this);
8686         var scale0 = this.__chart__ || scale, scale1 = this.__chart__ = scale.copy();
8687         var ticks = tickValues == null ? scale1.ticks ? scale1.ticks.apply(scale1, tickArguments_) : scale1.domain() : tickValues, tickFormat = tickFormat_ == null ? scale1.tickFormat ? scale1.tickFormat.apply(scale1, tickArguments_) : d3_identity : tickFormat_, tick = g.selectAll(".tick").data(ticks, scale1), tickEnter = tick.enter().insert("g", ".domain").attr("class", "tick").style("opacity", ε), tickExit = d3.transition(tick.exit()).style("opacity", ε).remove(), tickUpdate = d3.transition(tick.order()).style("opacity", 1), tickTransform;
8688         var range = d3_scaleRange(scale1), path = g.selectAll(".domain").data([ 0 ]), pathUpdate = (path.enter().append("path").attr("class", "domain"),
8689         d3.transition(path));
8690         tickEnter.append("line");
8691         tickEnter.append("text");
8692         var lineEnter = tickEnter.select("line"), lineUpdate = tickUpdate.select("line"), text = tick.select("text").text(tickFormat), textEnter = tickEnter.select("text"), textUpdate = tickUpdate.select("text");
8693         switch (orient) {
8694          case "bottom":
8695           {
8696             tickTransform = d3_svg_axisX;
8697             lineEnter.attr("y2", innerTickSize);
8698             textEnter.attr("y", Math.max(innerTickSize, 0) + tickPadding);
8699             lineUpdate.attr("x2", 0).attr("y2", innerTickSize);
8700             textUpdate.attr("x", 0).attr("y", Math.max(innerTickSize, 0) + tickPadding);
8701             text.attr("dy", ".71em").style("text-anchor", "middle");
8702             pathUpdate.attr("d", "M" + range[0] + "," + outerTickSize + "V0H" + range[1] + "V" + outerTickSize);
8703             break;
8704           }
8705
8706          case "top":
8707           {
8708             tickTransform = d3_svg_axisX;
8709             lineEnter.attr("y2", -innerTickSize);
8710             textEnter.attr("y", -(Math.max(innerTickSize, 0) + tickPadding));
8711             lineUpdate.attr("x2", 0).attr("y2", -innerTickSize);
8712             textUpdate.attr("x", 0).attr("y", -(Math.max(innerTickSize, 0) + tickPadding));
8713             text.attr("dy", "0em").style("text-anchor", "middle");
8714             pathUpdate.attr("d", "M" + range[0] + "," + -outerTickSize + "V0H" + range[1] + "V" + -outerTickSize);
8715             break;
8716           }
8717
8718          case "left":
8719           {
8720             tickTransform = d3_svg_axisY;
8721             lineEnter.attr("x2", -innerTickSize);
8722             textEnter.attr("x", -(Math.max(innerTickSize, 0) + tickPadding));
8723             lineUpdate.attr("x2", -innerTickSize).attr("y2", 0);
8724             textUpdate.attr("x", -(Math.max(innerTickSize, 0) + tickPadding)).attr("y", 0);
8725             text.attr("dy", ".32em").style("text-anchor", "end");
8726             pathUpdate.attr("d", "M" + -outerTickSize + "," + range[0] + "H0V" + range[1] + "H" + -outerTickSize);
8727             break;
8728           }
8729
8730          case "right":
8731           {
8732             tickTransform = d3_svg_axisY;
8733             lineEnter.attr("x2", innerTickSize);
8734             textEnter.attr("x", Math.max(innerTickSize, 0) + tickPadding);
8735             lineUpdate.attr("x2", innerTickSize).attr("y2", 0);
8736             textUpdate.attr("x", Math.max(innerTickSize, 0) + tickPadding).attr("y", 0);
8737             text.attr("dy", ".32em").style("text-anchor", "start");
8738             pathUpdate.attr("d", "M" + outerTickSize + "," + range[0] + "H0V" + range[1] + "H" + outerTickSize);
8739             break;
8740           }
8741         }
8742         if (scale1.rangeBand) {
8743           var x = scale1, dx = x.rangeBand() / 2;
8744           scale0 = scale1 = function(d) {
8745             return x(d) + dx;
8746           };
8747         } else if (scale0.rangeBand) {
8748           scale0 = scale1;
8749         } else {
8750           tickExit.call(tickTransform, scale1);
8751         }
8752         tickEnter.call(tickTransform, scale0);
8753         tickUpdate.call(tickTransform, scale1);
8754       });
8755     }
8756     axis.scale = function(x) {
8757       if (!arguments.length) return scale;
8758       scale = x;
8759       return axis;
8760     };
8761     axis.orient = function(x) {
8762       if (!arguments.length) return orient;
8763       orient = x in d3_svg_axisOrients ? x + "" : d3_svg_axisDefaultOrient;
8764       return axis;
8765     };
8766     axis.ticks = function() {
8767       if (!arguments.length) return tickArguments_;
8768       tickArguments_ = arguments;
8769       return axis;
8770     };
8771     axis.tickValues = function(x) {
8772       if (!arguments.length) return tickValues;
8773       tickValues = x;
8774       return axis;
8775     };
8776     axis.tickFormat = function(x) {
8777       if (!arguments.length) return tickFormat_;
8778       tickFormat_ = x;
8779       return axis;
8780     };
8781     axis.tickSize = function(x) {
8782       var n = arguments.length;
8783       if (!n) return innerTickSize;
8784       innerTickSize = +x;
8785       outerTickSize = +arguments[n - 1];
8786       return axis;
8787     };
8788     axis.innerTickSize = function(x) {
8789       if (!arguments.length) return innerTickSize;
8790       innerTickSize = +x;
8791       return axis;
8792     };
8793     axis.outerTickSize = function(x) {
8794       if (!arguments.length) return outerTickSize;
8795       outerTickSize = +x;
8796       return axis;
8797     };
8798     axis.tickPadding = function(x) {
8799       if (!arguments.length) return tickPadding;
8800       tickPadding = +x;
8801       return axis;
8802     };
8803     axis.tickSubdivide = function() {
8804       return arguments.length && axis;
8805     };
8806     return axis;
8807   };
8808   var d3_svg_axisDefaultOrient = "bottom", d3_svg_axisOrients = {
8809     top: 1,
8810     right: 1,
8811     bottom: 1,
8812     left: 1
8813   };
8814   function d3_svg_axisX(selection, x) {
8815     selection.attr("transform", function(d) {
8816       return "translate(" + x(d) + ",0)";
8817     });
8818   }
8819   function d3_svg_axisY(selection, y) {
8820     selection.attr("transform", function(d) {
8821       return "translate(0," + y(d) + ")";
8822     });
8823   }
8824   d3.svg.brush = function() {
8825     var event = d3_eventDispatch(brush, "brushstart", "brush", "brushend"), x = null, y = null, xExtent = [ 0, 0 ], yExtent = [ 0, 0 ], xExtentDomain, yExtentDomain, xClamp = true, yClamp = true, resizes = d3_svg_brushResizes[0];
8826     function brush(g) {
8827       g.each(function() {
8828         var g = d3.select(this).style("pointer-events", "all").style("-webkit-tap-highlight-color", "rgba(0,0,0,0)").on("mousedown.brush", brushstart).on("touchstart.brush", brushstart);
8829         var background = g.selectAll(".background").data([ 0 ]);
8830         background.enter().append("rect").attr("class", "background").style("visibility", "hidden").style("cursor", "crosshair");
8831         g.selectAll(".extent").data([ 0 ]).enter().append("rect").attr("class", "extent").style("cursor", "move");
8832         var resize = g.selectAll(".resize").data(resizes, d3_identity);
8833         resize.exit().remove();
8834         resize.enter().append("g").attr("class", function(d) {
8835           return "resize " + d;
8836         }).style("cursor", function(d) {
8837           return d3_svg_brushCursor[d];
8838         }).append("rect").attr("x", function(d) {
8839           return /[ew]$/.test(d) ? -3 : null;
8840         }).attr("y", function(d) {
8841           return /^[ns]/.test(d) ? -3 : null;
8842         }).attr("width", 6).attr("height", 6).style("visibility", "hidden");
8843         resize.style("display", brush.empty() ? "none" : null);
8844         var gUpdate = d3.transition(g), backgroundUpdate = d3.transition(background), range;
8845         if (x) {
8846           range = d3_scaleRange(x);
8847           backgroundUpdate.attr("x", range[0]).attr("width", range[1] - range[0]);
8848           redrawX(gUpdate);
8849         }
8850         if (y) {
8851           range = d3_scaleRange(y);
8852           backgroundUpdate.attr("y", range[0]).attr("height", range[1] - range[0]);
8853           redrawY(gUpdate);
8854         }
8855         redraw(gUpdate);
8856       });
8857     }
8858     brush.event = function(g) {
8859       g.each(function() {
8860         var event_ = event.of(this, arguments), extent1 = {
8861           x: xExtent,
8862           y: yExtent,
8863           i: xExtentDomain,
8864           j: yExtentDomain
8865         }, extent0 = this.__chart__ || extent1;
8866         this.__chart__ = extent1;
8867         if (d3_transitionInheritId) {
8868           d3.select(this).transition().each("start.brush", function() {
8869             xExtentDomain = extent0.i;
8870             yExtentDomain = extent0.j;
8871             xExtent = extent0.x;
8872             yExtent = extent0.y;
8873             event_({
8874               type: "brushstart"
8875             });
8876           }).tween("brush:brush", function() {
8877             var xi = d3_interpolateArray(xExtent, extent1.x), yi = d3_interpolateArray(yExtent, extent1.y);
8878             xExtentDomain = yExtentDomain = null;
8879             return function(t) {
8880               xExtent = extent1.x = xi(t);
8881               yExtent = extent1.y = yi(t);
8882               event_({
8883                 type: "brush",
8884                 mode: "resize"
8885               });
8886             };
8887           }).each("end.brush", function() {
8888             xExtentDomain = extent1.i;
8889             yExtentDomain = extent1.j;
8890             event_({
8891               type: "brush",
8892               mode: "resize"
8893             });
8894             event_({
8895               type: "brushend"
8896             });
8897           });
8898         } else {
8899           event_({
8900             type: "brushstart"
8901           });
8902           event_({
8903             type: "brush",
8904             mode: "resize"
8905           });
8906           event_({
8907             type: "brushend"
8908           });
8909         }
8910       });
8911     };
8912     function redraw(g) {
8913       g.selectAll(".resize").attr("transform", function(d) {
8914         return "translate(" + xExtent[+/e$/.test(d)] + "," + yExtent[+/^s/.test(d)] + ")";
8915       });
8916     }
8917     function redrawX(g) {
8918       g.select(".extent").attr("x", xExtent[0]);
8919       g.selectAll(".extent,.n>rect,.s>rect").attr("width", xExtent[1] - xExtent[0]);
8920     }
8921     function redrawY(g) {
8922       g.select(".extent").attr("y", yExtent[0]);
8923       g.selectAll(".extent,.e>rect,.w>rect").attr("height", yExtent[1] - yExtent[0]);
8924     }
8925     function brushstart() {
8926       var target = this, eventTarget = d3.select(d3.event.target), event_ = event.of(target, arguments), g = d3.select(target), resizing = eventTarget.datum(), resizingX = !/^(n|s)$/.test(resizing) && x, resizingY = !/^(e|w)$/.test(resizing) && y, dragging = eventTarget.classed("extent"), dragRestore = d3_event_dragSuppress(), center, origin = d3.mouse(target), offset;
8927       var w = d3.select(d3_window).on("keydown.brush", keydown).on("keyup.brush", keyup);
8928       if (d3.event.changedTouches) {
8929         w.on("touchmove.brush", brushmove).on("touchend.brush", brushend);
8930       } else {
8931         w.on("mousemove.brush", brushmove).on("mouseup.brush", brushend);
8932       }
8933       g.interrupt().selectAll("*").interrupt();
8934       if (dragging) {
8935         origin[0] = xExtent[0] - origin[0];
8936         origin[1] = yExtent[0] - origin[1];
8937       } else if (resizing) {
8938         var ex = +/w$/.test(resizing), ey = +/^n/.test(resizing);
8939         offset = [ xExtent[1 - ex] - origin[0], yExtent[1 - ey] - origin[1] ];
8940         origin[0] = xExtent[ex];
8941         origin[1] = yExtent[ey];
8942       } else if (d3.event.altKey) center = origin.slice();
8943       g.style("pointer-events", "none").selectAll(".resize").style("display", null);
8944       d3.select("body").style("cursor", eventTarget.style("cursor"));
8945       event_({
8946         type: "brushstart"
8947       });
8948       brushmove();
8949       function keydown() {
8950         if (d3.event.keyCode == 32) {
8951           if (!dragging) {
8952             center = null;
8953             origin[0] -= xExtent[1];
8954             origin[1] -= yExtent[1];
8955             dragging = 2;
8956           }
8957           d3_eventPreventDefault();
8958         }
8959       }
8960       function keyup() {
8961         if (d3.event.keyCode == 32 && dragging == 2) {
8962           origin[0] += xExtent[1];
8963           origin[1] += yExtent[1];
8964           dragging = 0;
8965           d3_eventPreventDefault();
8966         }
8967       }
8968       function brushmove() {
8969         var point = d3.mouse(target), moved = false;
8970         if (offset) {
8971           point[0] += offset[0];
8972           point[1] += offset[1];
8973         }
8974         if (!dragging) {
8975           if (d3.event.altKey) {
8976             if (!center) center = [ (xExtent[0] + xExtent[1]) / 2, (yExtent[0] + yExtent[1]) / 2 ];
8977             origin[0] = xExtent[+(point[0] < center[0])];
8978             origin[1] = yExtent[+(point[1] < center[1])];
8979           } else center = null;
8980         }
8981         if (resizingX && move1(point, x, 0)) {
8982           redrawX(g);
8983           moved = true;
8984         }
8985         if (resizingY && move1(point, y, 1)) {
8986           redrawY(g);
8987           moved = true;
8988         }
8989         if (moved) {
8990           redraw(g);
8991           event_({
8992             type: "brush",
8993             mode: dragging ? "move" : "resize"
8994           });
8995         }
8996       }
8997       function move1(point, scale, i) {
8998         var range = d3_scaleRange(scale), r0 = range[0], r1 = range[1], position = origin[i], extent = i ? yExtent : xExtent, size = extent[1] - extent[0], min, max;
8999         if (dragging) {
9000           r0 -= position;
9001           r1 -= size + position;
9002         }
9003         min = (i ? yClamp : xClamp) ? Math.max(r0, Math.min(r1, point[i])) : point[i];
9004         if (dragging) {
9005           max = (min += position) + size;
9006         } else {
9007           if (center) position = Math.max(r0, Math.min(r1, 2 * center[i] - min));
9008           if (position < min) {
9009             max = min;
9010             min = position;
9011           } else {
9012             max = position;
9013           }
9014         }
9015         if (extent[0] != min || extent[1] != max) {
9016           if (i) yExtentDomain = null; else xExtentDomain = null;
9017           extent[0] = min;
9018           extent[1] = max;
9019           return true;
9020         }
9021       }
9022       function brushend() {
9023         brushmove();
9024         g.style("pointer-events", "all").selectAll(".resize").style("display", brush.empty() ? "none" : null);
9025         d3.select("body").style("cursor", null);
9026         w.on("mousemove.brush", null).on("mouseup.brush", null).on("touchmove.brush", null).on("touchend.brush", null).on("keydown.brush", null).on("keyup.brush", null);
9027         dragRestore();
9028         event_({
9029           type: "brushend"
9030         });
9031       }
9032     }
9033     brush.x = function(z) {
9034       if (!arguments.length) return x;
9035       x = z;
9036       resizes = d3_svg_brushResizes[!x << 1 | !y];
9037       return brush;
9038     };
9039     brush.y = function(z) {
9040       if (!arguments.length) return y;
9041       y = z;
9042       resizes = d3_svg_brushResizes[!x << 1 | !y];
9043       return brush;
9044     };
9045     brush.clamp = function(z) {
9046       if (!arguments.length) return x && y ? [ xClamp, yClamp ] : x ? xClamp : y ? yClamp : null;
9047       if (x && y) xClamp = !!z[0], yClamp = !!z[1]; else if (x) xClamp = !!z; else if (y) yClamp = !!z;
9048       return brush;
9049     };
9050     brush.extent = function(z) {
9051       var x0, x1, y0, y1, t;
9052       if (!arguments.length) {
9053         if (x) {
9054           if (xExtentDomain) {
9055             x0 = xExtentDomain[0], x1 = xExtentDomain[1];
9056           } else {
9057             x0 = xExtent[0], x1 = xExtent[1];
9058             if (x.invert) x0 = x.invert(x0), x1 = x.invert(x1);
9059             if (x1 < x0) t = x0, x0 = x1, x1 = t;
9060           }
9061         }
9062         if (y) {
9063           if (yExtentDomain) {
9064             y0 = yExtentDomain[0], y1 = yExtentDomain[1];
9065           } else {
9066             y0 = yExtent[0], y1 = yExtent[1];
9067             if (y.invert) y0 = y.invert(y0), y1 = y.invert(y1);
9068             if (y1 < y0) t = y0, y0 = y1, y1 = t;
9069           }
9070         }
9071         return x && y ? [ [ x0, y0 ], [ x1, y1 ] ] : x ? [ x0, x1 ] : y && [ y0, y1 ];
9072       }
9073       if (x) {
9074         x0 = z[0], x1 = z[1];
9075         if (y) x0 = x0[0], x1 = x1[0];
9076         xExtentDomain = [ x0, x1 ];
9077         if (x.invert) x0 = x(x0), x1 = x(x1);
9078         if (x1 < x0) t = x0, x0 = x1, x1 = t;
9079         if (x0 != xExtent[0] || x1 != xExtent[1]) xExtent = [ x0, x1 ];
9080       }
9081       if (y) {
9082         y0 = z[0], y1 = z[1];
9083         if (x) y0 = y0[1], y1 = y1[1];
9084         yExtentDomain = [ y0, y1 ];
9085         if (y.invert) y0 = y(y0), y1 = y(y1);
9086         if (y1 < y0) t = y0, y0 = y1, y1 = t;
9087         if (y0 != yExtent[0] || y1 != yExtent[1]) yExtent = [ y0, y1 ];
9088       }
9089       return brush;
9090     };
9091     brush.clear = function() {
9092       if (!brush.empty()) {
9093         xExtent = [ 0, 0 ], yExtent = [ 0, 0 ];
9094         xExtentDomain = yExtentDomain = null;
9095       }
9096       return brush;
9097     };
9098     brush.empty = function() {
9099       return !!x && xExtent[0] == xExtent[1] || !!y && yExtent[0] == yExtent[1];
9100     };
9101     return d3.rebind(brush, event, "on");
9102   };
9103   var d3_svg_brushCursor = {
9104     n: "ns-resize",
9105     e: "ew-resize",
9106     s: "ns-resize",
9107     w: "ew-resize",
9108     nw: "nwse-resize",
9109     ne: "nesw-resize",
9110     se: "nwse-resize",
9111     sw: "nesw-resize"
9112   };
9113   var d3_svg_brushResizes = [ [ "n", "e", "s", "w", "nw", "ne", "se", "sw" ], [ "e", "w" ], [ "n", "s" ], [] ];
9114   var d3_time_format = d3_time.format = d3_locale_enUS.timeFormat;
9115   var d3_time_formatUtc = d3_time_format.utc;
9116   var d3_time_formatIso = d3_time_formatUtc("%Y-%m-%dT%H:%M:%S.%LZ");
9117   d3_time_format.iso = Date.prototype.toISOString && +new Date("2000-01-01T00:00:00.000Z") ? d3_time_formatIsoNative : d3_time_formatIso;
9118   function d3_time_formatIsoNative(date) {
9119     return date.toISOString();
9120   }
9121   d3_time_formatIsoNative.parse = function(string) {
9122     var date = new Date(string);
9123     return isNaN(date) ? null : date;
9124   };
9125   d3_time_formatIsoNative.toString = d3_time_formatIso.toString;
9126   d3_time.second = d3_time_interval(function(date) {
9127     return new d3_date(Math.floor(date / 1e3) * 1e3);
9128   }, function(date, offset) {
9129     date.setTime(date.getTime() + Math.floor(offset) * 1e3);
9130   }, function(date) {
9131     return date.getSeconds();
9132   });
9133   d3_time.seconds = d3_time.second.range;
9134   d3_time.seconds.utc = d3_time.second.utc.range;
9135   d3_time.minute = d3_time_interval(function(date) {
9136     return new d3_date(Math.floor(date / 6e4) * 6e4);
9137   }, function(date, offset) {
9138     date.setTime(date.getTime() + Math.floor(offset) * 6e4);
9139   }, function(date) {
9140     return date.getMinutes();
9141   });
9142   d3_time.minutes = d3_time.minute.range;
9143   d3_time.minutes.utc = d3_time.minute.utc.range;
9144   d3_time.hour = d3_time_interval(function(date) {
9145     var timezone = date.getTimezoneOffset() / 60;
9146     return new d3_date((Math.floor(date / 36e5 - timezone) + timezone) * 36e5);
9147   }, function(date, offset) {
9148     date.setTime(date.getTime() + Math.floor(offset) * 36e5);
9149   }, function(date) {
9150     return date.getHours();
9151   });
9152   d3_time.hours = d3_time.hour.range;
9153   d3_time.hours.utc = d3_time.hour.utc.range;
9154   d3_time.month = d3_time_interval(function(date) {
9155     date = d3_time.day(date);
9156     date.setDate(1);
9157     return date;
9158   }, function(date, offset) {
9159     date.setMonth(date.getMonth() + offset);
9160   }, function(date) {
9161     return date.getMonth();
9162   });
9163   d3_time.months = d3_time.month.range;
9164   d3_time.months.utc = d3_time.month.utc.range;
9165   function d3_time_scale(linear, methods, format) {
9166     function scale(x) {
9167       return linear(x);
9168     }
9169     scale.invert = function(x) {
9170       return d3_time_scaleDate(linear.invert(x));
9171     };
9172     scale.domain = function(x) {
9173       if (!arguments.length) return linear.domain().map(d3_time_scaleDate);
9174       linear.domain(x);
9175       return scale;
9176     };
9177     function tickMethod(extent, count) {
9178       var span = extent[1] - extent[0], target = span / count, i = d3.bisect(d3_time_scaleSteps, target);
9179       return i == d3_time_scaleSteps.length ? [ methods.year, d3_scale_linearTickRange(extent.map(function(d) {
9180         return d / 31536e6;
9181       }), count)[2] ] : !i ? [ d3_time_scaleMilliseconds, d3_scale_linearTickRange(extent, count)[2] ] : methods[target / d3_time_scaleSteps[i - 1] < d3_time_scaleSteps[i] / target ? i - 1 : i];
9182     }
9183     scale.nice = function(interval, skip) {
9184       var domain = scale.domain(), extent = d3_scaleExtent(domain), method = interval == null ? tickMethod(extent, 10) : typeof interval === "number" && tickMethod(extent, interval);
9185       if (method) interval = method[0], skip = method[1];
9186       function skipped(date) {
9187         return !isNaN(date) && !interval.range(date, d3_time_scaleDate(+date + 1), skip).length;
9188       }
9189       return scale.domain(d3_scale_nice(domain, skip > 1 ? {
9190         floor: function(date) {
9191           while (skipped(date = interval.floor(date))) date = d3_time_scaleDate(date - 1);
9192           return date;
9193         },
9194         ceil: function(date) {
9195           while (skipped(date = interval.ceil(date))) date = d3_time_scaleDate(+date + 1);
9196           return date;
9197         }
9198       } : interval));
9199     };
9200     scale.ticks = function(interval, skip) {
9201       var extent = d3_scaleExtent(scale.domain()), method = interval == null ? tickMethod(extent, 10) : typeof interval === "number" ? tickMethod(extent, interval) : !interval.range && [ {
9202         range: interval
9203       }, skip ];
9204       if (method) interval = method[0], skip = method[1];
9205       return interval.range(extent[0], d3_time_scaleDate(+extent[1] + 1), skip < 1 ? 1 : skip);
9206     };
9207     scale.tickFormat = function() {
9208       return format;
9209     };
9210     scale.copy = function() {
9211       return d3_time_scale(linear.copy(), methods, format);
9212     };
9213     return d3_scale_linearRebind(scale, linear);
9214   }
9215   function d3_time_scaleDate(t) {
9216     return new Date(t);
9217   }
9218   var d3_time_scaleSteps = [ 1e3, 5e3, 15e3, 3e4, 6e4, 3e5, 9e5, 18e5, 36e5, 108e5, 216e5, 432e5, 864e5, 1728e5, 6048e5, 2592e6, 7776e6, 31536e6 ];
9219   var d3_time_scaleLocalMethods = [ [ d3_time.second, 1 ], [ d3_time.second, 5 ], [ d3_time.second, 15 ], [ d3_time.second, 30 ], [ d3_time.minute, 1 ], [ d3_time.minute, 5 ], [ d3_time.minute, 15 ], [ d3_time.minute, 30 ], [ d3_time.hour, 1 ], [ d3_time.hour, 3 ], [ d3_time.hour, 6 ], [ d3_time.hour, 12 ], [ d3_time.day, 1 ], [ d3_time.day, 2 ], [ d3_time.week, 1 ], [ d3_time.month, 1 ], [ d3_time.month, 3 ], [ d3_time.year, 1 ] ];
9220   var d3_time_scaleLocalFormat = d3_time_format.multi([ [ ".%L", function(d) {
9221     return d.getMilliseconds();
9222   } ], [ ":%S", function(d) {
9223     return d.getSeconds();
9224   } ], [ "%I:%M", function(d) {
9225     return d.getMinutes();
9226   } ], [ "%I %p", function(d) {
9227     return d.getHours();
9228   } ], [ "%a %d", function(d) {
9229     return d.getDay() && d.getDate() != 1;
9230   } ], [ "%b %d", function(d) {
9231     return d.getDate() != 1;
9232   } ], [ "%B", function(d) {
9233     return d.getMonth();
9234   } ], [ "%Y", d3_true ] ]);
9235   var d3_time_scaleMilliseconds = {
9236     range: function(start, stop, step) {
9237       return d3.range(Math.ceil(start / step) * step, +stop, step).map(d3_time_scaleDate);
9238     },
9239     floor: d3_identity,
9240     ceil: d3_identity
9241   };
9242   d3_time_scaleLocalMethods.year = d3_time.year;
9243   d3_time.scale = function() {
9244     return d3_time_scale(d3.scale.linear(), d3_time_scaleLocalMethods, d3_time_scaleLocalFormat);
9245   };
9246   var d3_time_scaleUtcMethods = d3_time_scaleLocalMethods.map(function(m) {
9247     return [ m[0].utc, m[1] ];
9248   });
9249   var d3_time_scaleUtcFormat = d3_time_formatUtc.multi([ [ ".%L", function(d) {
9250     return d.getUTCMilliseconds();
9251   } ], [ ":%S", function(d) {
9252     return d.getUTCSeconds();
9253   } ], [ "%I:%M", function(d) {
9254     return d.getUTCMinutes();
9255   } ], [ "%I %p", function(d) {
9256     return d.getUTCHours();
9257   } ], [ "%a %d", function(d) {
9258     return d.getUTCDay() && d.getUTCDate() != 1;
9259   } ], [ "%b %d", function(d) {
9260     return d.getUTCDate() != 1;
9261   } ], [ "%B", function(d) {
9262     return d.getUTCMonth();
9263   } ], [ "%Y", d3_true ] ]);
9264   d3_time_scaleUtcMethods.year = d3_time.year.utc;
9265   d3_time.scale.utc = function() {
9266     return d3_time_scale(d3.scale.linear(), d3_time_scaleUtcMethods, d3_time_scaleUtcFormat);
9267   };
9268   d3.text = d3_xhrType(function(request) {
9269     return request.responseText;
9270   });
9271   d3.json = function(url, callback) {
9272     return d3_xhr(url, "application/json", d3_json, callback);
9273   };
9274   function d3_json(request) {
9275     return JSON.parse(request.responseText);
9276   }
9277   d3.html = function(url, callback) {
9278     throw "disallowed by chromium security";
9279     return d3_xhr(url, "text/html", d3_html, callback);
9280   };
9281   function d3_html(request) {
9282     throw "disallowed by chromium security";
9283     var range = d3_document.createRange();
9284     range.selectNode(d3_document.body);
9285     return range.createContextualFragment(request.responseText);
9286   }
9287   d3.xml = d3_xhrType(function(request) {
9288     return request.responseXML;
9289   });
9290   if (typeof define === "function" && define.amd) {
9291     define(d3);
9292   } else if (typeof module === "object" && module.exports) {
9293     module.exports = d3;
9294   } else {
9295     this.d3 = d3;
9296   }
9297 }();