>>>>> "Flavio" == Flavio Codeco Coelho <fcc...@fi...> writes:
Flavio> Hi, Is there a way to set the color of an histogram? what
Flavio> about transparency ?
Flavio> for example:
Flavio> h=hist(x... set(h,'alpha',0.75)
Of course, not all backends support the alpha channel (eg postscript),
but this is already possible with the agg backend
Here is some example code
n, binsb, pb = hist(sb, 100,normed=True)
set(pb, 'facecolor', 'r', 'alpha', 1.0)
Perhaps the problem with your test code above is that histogram
returns a tuple of (counts, bins, patches) and you need to set the
alpha on the patches only.
Flavio> I would like to superimpose histograms on the same plot
Flavio> but they would have to be of different colors and be
Flavio> translucent.
Flavio> I need to do this in using the matlab interface, not the
Flavio> API.
Yep, I've done exactly this before using the code above; here's an
example image where one histogram is translucent gray superimposed
over a red histogram
http://nitace.bsd.uchicago.edu:8080/files/share/aptopower.png
JDH
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