Re: [Matplotlib-users] imshow() with a colorbar?

[Eric F. <ef...@ha...>]

On 02/07/2011 10:48 AM, Daniel Mader wrote:
> Hi,
>
> I am trying to add a (configurable) colorbar to a an array which I
> simply plot with imshow().
>
> Could anyone please help me how to enhance it with a colorbar?

Check out the gallery; several examples there use a colorbar. 
http://matplotlib.sourceforge.net/gallery.html

Then look for relevant sections in the docs, such as
http://matplotlib.sourceforge.net/users/image_tutorial.html
http://matplotlib.sourceforge.net/api/pyplot_api.html#matplotlib.pyplot.colorbar
etc.

Eric

>
> import scipy,pylab
> import matplotlib.cm <http://matplotlib.cm> as cm # colormaps
> import matplotlib.colors as col # colormaps
>
> dat = scipy.array([[1,2,3,4],[5,6,7,8]])
>
> fig = pylab.figure()
> ax = pylab.gca()
> ax.set_title('the title')
>
> ## here's chaos :)
> #cmap = cm.get_cmap('rainbow', 20) # 10 discrete colors
> #ax.imshow(dat, cmap=cmap, interpolation='nearest')
> #fig.colorbar(dat)
> #min,max = dat.min(),dat.max()
>
> ax.imshow(dat,interpolation='nearest')
> pylab.show()
>
> Thanks a lot in advance,
> Daniel
>
>
>
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