examples/bargraphs/errors.py

   1 # This example shows a bar graph, which starts with
   2 # a stacked bar skipping to plot the original bar.
   3 # This is done by using stackedbarpos before plotting
   4 # a bar with the bar style. However you can still add
   5 # errorbars, even to the lower bound of the bar.
   6 # This example also shows how to handle several errorbars
   7 # in one plot command by the usenames argument of the
   8 # range style.
   9
  10 from random import random
  11 from pyx import *
  12
  13 g = graph.graphxy(width=8, x=graph.axis.bar())
  14 g.plot(graph.data.file("bar.dat", xname=0, y=2, stack=3,
  15                        dy="1+random()", dstack="1+random()",
  16                        context={"random": random}),
  17        [graph.style.errorbar(),
  18         graph.style.stackedbarpos("stack"),
  19         graph.style.bar([color.rgb.green]),
  20         graph.style.range({"y": "stack"}),
  21         graph.style.errorbar()])
  22 g.writeEPSfile("errors")
  23 g.writePDFfile("errors")