Thanks John. The bar_stacked example does not seem to work for histograms, but I'm glad to know that we could manually make the legends.
I still do not know how to specify the colors of the "stacks" in my histogram,
so adding the manual legends for them is still a pain -- but at least doable since I can
figure it out from the actual data.
best,
amit shrestha
John Hunter wrote:
On Tue, Jun 2, 2009 at 3:15 PM, Amit <[email protected]> wrote:
Hi all,
Has any of you had any luck with creating stacked histograms using
matplotlib? It seems to work but I have no idea how to label (or add the
legend) or choose the colors of the stacks. Below is a sample code for
creating a stacked histogram. Can anyone help please? Unlike the "bar()"
function, hist() doesn't seem to have the color/colors parameter.
#!/usr/bin/python
import sys
import matplotlib.pyplot as pyplot
import numpy as numpy
page_numbers_one = (100,100,500,600,800)
page_numbers_two = (100,100,500,600,800,100,100,100,100,100)
page_numbers_three = (900,100,500,600,800,500)
pyplot.hist((page_numbers_one,page_numbers_two,page_numbers_three),histtype='barstacked',bins=5)
pyplot.show()
Have you seen this example:
http://matplotlib.sourceforge.net/examples/pylab_examples/bar_stacked.html
To create the legend, it is best to create proxy objects, eg
Rectangles, with the right colors and manually add them to the legend.
See
http://matplotlib.sourceforge.net/users/plotting/legend.html#using-proxy-artist
JDH
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