Updating bar graph data

Traceback (most recent call last): File

    > "dynamic_demo_wx.py", line 108, in onTimer
    > self.bar[1].set_data(self.ind,self.data) AttributeError:
    > Rectangle instance has no attribute 'set_data'

    > Can anyone help? I've pored over the onilne docs, and
    > tried various changes, to no affect.

See examples/system_monitor.py, which shows you how to dynamically
update a bar graph.

bar returns a list of Rectangles, which are a subclass of Patch,
defined here: http://matplotlib.sf.net/matplotlib.patches.html. You
can call any of the methods defined for a Patch or Rectangle, eg