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