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  • Committer: Bazaar Package Importer
  • Author(s): Thomas Viehmann
  • Date: 2006-11-26 14:04:53 UTC
  • mfrom: (2.1.3 edgy)
  • Revision ID: james.westby@ubuntu.com-20061126140453-1dq3cycpspmlik2t
Tags: 0.9-3
http://bugs.debian.org/400087
http://bugs.debian.org/392634
* New maintainer. Thank you for more than three years of
  maintenance,  Graham! Closes: #400087
* Don't hard-code python 2.3 in manual/Makefile.
  Thanks to Matthias Klose for the bug report and patch.
  Closes: #392634
* Remove obsolete dh_python call from debian/rules.

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gallery/graphs/integral.py
 
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from pyx import *
 
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a, b = 2, 9 # integral area
 
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p = graph.axis.painter.regular(basepathattrs=[deco.earrow.normal],
 
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                               titlepos=0.98, titledirection=None)
 
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ticks = [graph.axis.tick.tick(a, label="$a$"),
 
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         graph.axis.tick.tick(b, label="$b$")]
 
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g = graph.graphxy(width=8, x2=None, y2=None,
 
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                  x=graph.axis.linear(title="$x$", min=0, max=10,
 
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                                      manualticks=ticks,
 
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                                      parter=None, painter=p),
 
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                  y=graph.axis.linear(title="$y$", parter=None, painter=p))
 
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d = g.plot(graph.data.function("y(x)=(x-3)*(x-5)*(x-7)"))
 
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g.finish()
 
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p = d.path # the path is available after the graph is finished
 
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pa = g.xgridpath(a)
 
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pb = g.xgridpath(b)
 
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(splita,), (splitpa,) = p.intersect(pa)
 
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(splitb,), (splitpb,) = p.intersect(pb)
 
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area = (pa.split([splitpa])[0] <<
 
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        p.split([splita, splitb])[1] <<
 
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        pb.split([splitpb])[0].reversed())
 
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area[-1].close()
 
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g.stroke(area, [deco.filled([color.gray(0.8)])])
 
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g.text(g.pos(0.5 * (a + b), 0)[0], 1,
 
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       r"\int_a^b f(x){\rm d}x", [text.halign.center, text.mathmode])
 
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g.writeEPSfile("integral")
 
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g.writePDFfile("integral")