I think what you are looking for is a way to specify the colormap of your
plot. While the documentation is a little sparse on this topic, there is
plenty of functionality in matplotlib regarding colormaps.
Here is a list of built-in colormaps:
http://matplotlib.sourceforge.net/api/pyplot_api.html?highlight=colormap#matplotlib.pyplot.colormaps
Just about any matplotlib plotting function accepts a cmap keyword where you
can specify a colormap of your choice to override the default. You can even
create your own colormap if you can't find one to suit your needs.
I hope this is helpful.
Ben Root
On Sat, Jun 5, 2010 at 9:41 PM, per freem <perfr...@gmail.com> wrote:
> Hi all,
>
> How can I plot a matrix of values as a heatmap where values are shown
> from green to red intensities, or blue to yellow intensities, like in
> the following figure?
>
> http://www.coriell.org/images/microarray.gif
>
> I want to have the option of doing this with either green-red maps or
> blue-yellow maps. Is the right function for this imshow, or pcolor?
> Also, how can I get the scale bar to the left of it that shows the
> ranges of the intensities, and how can this scale be adjusted?
>
> Thanks very much.
>
>
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