PyX - Example: axis/minimal.py
Minimal example drawing an axis along a path
from pyx import * c = graph.axis.pathaxis(path.curve(0, 0, 3, 0, 1, 4, 4, 4), graph.axis.linear(min=0, max=10)) c.writeEPSfile("minimal") c.writePDFfile("minimal")
Description
This is the basic example how to draw an axis along an arbitrary path. The function pathaxis from the graph.axis module takes a path and returns a canvas. As opposed to the typical usecase in graphs, we must fix the axis range by appropriate min and max arguments, because no data is provided to the axis instance where a data range could be extracted from. In graphs the range of an axis gets adjusted automatically although you can still set minimal and/or maximal values to force a certain axis range.
The axis instance is passed as the second argument to the pathaxis function. To use the axis at a graph all you need to do is to path the instance to the axis constructor using an appropriate keyword specifying the axis name.