I can't tell if I'm misusing collections here, or if there is a bug.
Anyway, what I'm trying to do is keep track of a group of rectangles
generated from a bar plot. Instead of letting there be a large number of
artists added to the axes, I wanted to just group them into a collection
and add the collection instead. As in the code below:
#!/usr/bin/env python
import numpy
import matplotlib.pyplot as plt
import matplotlib.collections
# just generate some data to plot
x = numpy.linspace(0.0,2.0*numpy.pi,10)
y = numpy.sin(x)
# plot
axes = plt.gca()
bars = plt.bar(x,y,color='red',width=0.1)
# strip out all of the newly inserted rectangles
for b in bars: b.remove()
# and create a collection for plotting the rectangles instead.
coll = matplotlib.collections.PatchCollection(bars)
axes.artists.append(coll)
plt.xlim(0.0,2.0*numpy.pi)
plt.grid(True)
plt.show()
This appears to work at first blush, but if you resize the plot, you can
tell that the rectangles are just fixed in their location now. I tried
messing around with setting the transform for the new collection object
"coll" in different ways, to no avail. Any suggestions welcome ;)
--
Daniel Hyams
dhy...@gmail.com
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