examples/graphs/bar.py

   1 from pyx import *                   # bar.dat looks like:
   2 from pyx.graph import axis          # #month    min max
   3                                     # January    -5   1
   4                                     # Feburary   -4   3
   5 # we prepare some stuff first                   ...
   6 bap = axis.painter.bar # just an abbreviation
   7 a1 = axis.bar(painter=bap(nameattrs=None)) # for single bars
   8 a2 = axis.bar(painter=bap(nameattrs=[trafo.rotate(45),
   9                                      text.halign.right],
  10                                      innerticklength=0.2),
  11                         subaxis=axis.bar(dist=0)) # for several bars
  12 nofirst = [attr.changelist([None, color.rgb.green])] # special draw attrs
  13
  14 c = canvas.canvas() # we draw several plots, thus we create a main canvas
  15 g = c.insert(graph.graphxy(ypos=4.5, width=8, height=4, x=a1))
  16 g.plot(graph.data.file("bar.dat", xname=1, y=2, ystack1=3),
  17        graph.style.bar(barattrs=nofirst))
  18 g2 = c.insert(graph.graphxy(width=8, x=a2, height=4))
  19 g2.plot([graph.data.file("bar.dat", xname=1, y=2),
  20          graph.data.file("bar.dat", xname=1, y=3)],
  21         graph.style.bar())
  22 c.writeEPSfile("bar")