gallery/graphs/symbolline.py

   1 # contributed by Francisco Borges
   2
   3 from pyx import *
   4 from pyx.graph import graphxy, data, axis
   5 from pyx.graph.axis import painter, tick
   6 from pyx.deco import earrow
   7
   8 range = 2.5
   9
  10 p = painter.regular(basepathattrs=[earrow.normal], titlepos=0.95,
  11                     outerticklength=painter.ticklength.normal,
  12                     titledist=-0.3, titledirection=None) # horizontal text
  13
  14 g = graphxy(width=10, xaxisat=0, yaxisat=0,
  15             x=axis.linear(title="$x$", min=-range, max=+range, painter=p,
  16                           # suppress some ticks by overwriting ...
  17                           manualticks=[tick.tick(0, None, None),
  18                                        tick.tick(range, None, None)]),
  19             y=axis.linear(title=r"$x\sin(x^2)$", painter=p,
  20                           manualticks=[tick.tick(0, None, None),
  21                                        tick.tick(3, None, None)]))
  22
  23 g.plot(data.function("y(x)=x*sin(x**2)"),
  24        # Line style is set before symbol style -> symbols will be draw
  25        # above the line.
  26        [graph.style.line([style.linewidth.Thin, style.linestyle.solid]),
  27         graph.style.symbol(graph.style.symbol.circle, size=0.1,
  28                            symbolattrs=[deco.filled([color.rgb.green]),
  29                                         deco.stroked([color.rgb.red])])])
  30
  31 # manually typeset "0" near the origin
  32 g.dolayout()
  33 x0, y0 = g.pos(0, 0)
  34 g.text(x0 - 0.2, y0 - 0.2, "0", [text.halign.right, text.valign.top])
  35
  36 g.writeEPSfile("symbolline")
  37 g.writePDFfile("symbolline")