examples/bargraphs/compare.py

   1 # When plotting several bars with the same style in a bar graph,
   2 # they are plotted side by side. You have to create a nested bar
   3 # axis to make each position in the bar graph to contain another
   4 # bar axis. Additionally you can see, how you can explicitly add
   5 # the parpos style in front of the bar style to set the fromvalue
   6 # parameter, which allows to start bars at a certain value instead
   7 # of starting them at the baseline.
   8
   9 from pyx import *
  10
  11 bap = graph.axis.painter.bar
  12 a = graph.axis.nestedbar(painter=bap(nameattrs=[trafo.rotate(45),
  13                                                 text.halign.right],
  14                                      innerticklength=0.1))
  15
  16 g = graph.graphxy(width=8, x=a)
  17 g.plot([graph.data.file("bar.dat", xname="$1, 0", y=2),
  18         graph.data.file("bar.dat", xname="$1, 1", y=3)],
  19        [graph.style.barpos(fromvalue=0), graph.style.bar()])
  20 g.writeEPSfile("compare")
  21 g.writePDFfile("compare")