Re: [Matplotlib-users] colorbar for figure not mappable - zap edge lines

[John H. <jdh...@ac...>]

>>>>> "James" == James Boyle <bo...@ll...> writes:

    James> To reply to my own post: On question (1): I modified the
    James> call to colorbar in pylab.py to accept a color map and norm
    James> keyword arguments. It was this functionality that was

Perhaps it would be cleaner simply to derive a custom class from
ScalarMappable that does your fill calls and stores your cmap and norm
instances; then you would get the observer stuff for free.  If you
decide to go this route, perhaps you could submit the example.

    James> I would also like to code up a floating color bar. Often I
    James> make 4/5 images per page with a common colormap and
    James> normalization. It is handy just to plop the reference
    James> colorbar in a central location not attached to a particular
    James> figure.

I just committed changes to CVS to support this -- you can now place a
colorbar in a custom axes, and I added an orientation kwarg to
support horizontal or vertical colorbar layout.  Make sure you get
pylab.py revision 1.21 or later.

Here is an example

from pylab import *

ax = axes([0.1, 0.3, 0.8, 0.6])
im = imshow(rand(12,12), interpolation='nearest')

cax = axes([0.1, 0.1, 0.8, 0.15])
colorbar(cax=cax, orientation='horizontal')
show()

    James> On question (2): Alan Isaac pointed out that using the same
    James> edgecolor as the fillcolor would make the borders
    James> invisible.

Yep.

JDH