How can I add textures to my bars and wedges?

Question

I\'m drawing several bar and pie charts using matplotlib.pyplot.bar() and matplotlib.pyplot.pie(). In both functions, I can change the colors of the bars and wedges.

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Answer 1

With bar(), you can directly use hatches (with some backends): http://matplotlib.org/examples/pylab_examples/hatch_demo.html:

It works by adding the hatch argument to your call to bar().

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As for pie(), it does not have a hatch keyword. You can instead get the individual pie chart patches and add hatches to them: you get the patches with:

patches = pie(…)[0]  # The first element of the returned tuple are the pie slices

then you apply the hatches to each slice (patch):

patches[0].set_hatch('/')  # Pie slice #0 hatched.

(hatches list at https://matplotlib.org/api/_as_gen/matplotlib.patches.Patch.html#matplotlib.patches.Patch.set_hatch).

And you apply the changes with:

pyplot.draw()