[Matplotlib-users] Color bar with discrete colors

[Carol L. <car...@sr...>]

I am confused about what is happening when I add a color bar to an image 
using discrete colors. I took the example code for poormans_contour.py 
and added a color bar to it.

The color bar show 9, not 10, equal sized pieces.  I figured that the 
10th color could be just a strip on top which was never used in the 
plot.  Therefor I set the limits of the plot to -0.1 and 0.1 to ensure 
that parts of the image were below the minimum and parts were above the 
maximum.  Now I can clearly see 10 colors on the plot, but only 9 on the 
color bar.  Was this the intention?  Is there another method of putting 
a color bar on a contour plot of this type?

This is how I modified poormans_contour.py:

After the call to imshow in line 34, I added
clim(vmin = -0.1, vmax = 0.1)
colorbar()


-- 
Ms. Carol A. Leger
SRI International			Phone: (650) 859-4114
333 Ravenswood Avenue G-273
Menlo Park, CA 94025                    e-mail: le...@sr...