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

[James B. <bo...@ll...>]

To reply to my own post:
On question (1):
I modified the call to colorbar in pylab.py to accept a color map and 
norm keyword arguments. It was this functionality that was needed from 
the mappable image. So if the keywords are provided colorbar uses them, 
otherwise it looks for a mappable image.
This modification disables the observer feature for now if the color 
map is a keyword, a bit more work should get this going.
It looks like it would be easily doable, but I need something for the 
exigencies of work and will get back to this later.
This also would allow for a colorbar key for coloring contours and 
vectors.
I would also like to code up a floating color bar. Often I make 4/5 
images per page with a common colormap and normalization. It is
handy just to plop the reference colorbar in a central location not 
attached to a particular figure.

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


--Jim

On Jan 12, 2005, at 12:55 PM, James Boyle wrote:

> I have a mesh of irregular polygons, like a finite element mesh. Each 
> polygon has an associated value.
> So, I have defined a color map with a appropriate normalization to 
> define a color for each value and then
> built a collection consisting of the polygon vertices and colors.
> The resulting plot looks pretty good. This technique would seem to be 
> useful for FE grids and Delaunay triangles.
>
> Two questions:
> (1) I want to attach a colorbar to the figure, but as of yet I have 
> not worked out how to do it.
> images such as scatter, imshow, pcolor are mappable and will accept a 
> color bar but my simple polygon fill will not.
>
> (2) How do I eliminate the edge lines about each polygon? I can make 
> them very thin but a width of zero does not appear to work.
> I recall this being discussed on the list, but now I cannot find the 
> reference.
>
> Thanks for any help.
>
> --Jim
>
>
>
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