Help/UnaryOps/sign.html

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  18 <p class="p1"><b>sign<span class="Apple-tab-span">      </span><span class="Apple-tab-span">    </span><span class="Apple-tab-span">    </span>sign function</b></p>
  19 <p class="p2"><br></p>
  20 <p class="p3"><b>a.sign</b></p>
  21 <p class="p3"><b>sign(a)</b></p>
  22 <p class="p2"><br></p>
  23 <p class="p3">-1 when a &lt; 0, +1 when a &gt; 0, 0 when a is 0</p>
  24 <p class="p2"><br></p>
  25 <p class="p4">(</p>
  26 <p class="p4">{</p>
  27 <p class="p4"><span class="Apple-tab-span">     </span>var a;</p>
  28 <p class="p4"><span class="Apple-tab-span">     </span>a = Line.ar(-1, 1, 0.01);</p>
  29 <p class="p4"><span class="Apple-tab-span">     </span>[ a, a.sign ]</p>
  30 <p class="p4">}.plot)</p>
  31 <p class="p2"><br></p>
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