examples/axis/rating.py

   1 # In the example below, several axes with the same parameters are
   2 # plotted on a path scaled in 3 different sizes. Note that the axes
   3 # adjust the ticks appropriately to the available space. The rating
   4 # mechanism takes into account the number of ticks and subticks, but
   5 # also the distances between the labels. Thus, the example in the
   6 # middle has less ticks than the smallest version, because there is
   7 # not enough room for labels with a decimal place.
   8 #
   9 # The rating mechanism is configurable and exchangeable by the axis
  10 # keyword argument "rater". Instead of reconfiguring the rating
  11 # mechanism, simple adjustments to favour more or less ticks are
  12 # possible by the axis keyword argument "density".
  13
  14 from pyx import *
  15 from pyx.graph import axis
  16
  17 p = path.curve(0, 0, 3, 0, 1, 4, 4, 4)
  18
  19 c = canvas.canvas()
  20 c.insert(axis.pathaxis(p.transformed(trafo.translate(-4, 0).scaled(0.75)),
  21                        axis.linear(min=0, max=10)))
  22 c.insert(axis.pathaxis(p, axis.linear(min=0, max=10)))
  23 c.insert(axis.pathaxis(p.transformed(trafo.scale(1.25).translated(4, 0)),
  24                        axis.linear(min=0, max=10)))
  25 c.writeEPSfile("rating")
  26 c.writePDFfile("rating")