Re: [Matplotlib-users] "N" parameter of LinearSegmentedColormap

[TP <par...@fr...>]

On Monday, November 26, 2012 12:06:40 Eric Firing wrote:
> I'm glad you found a solution, but my sense is that the problem is that
> you are trying to make the colormap do the work of the norm.  The
> colormap is just a set of discrete colors, with a linear mapping to the
> 0-1 scale (apart from the special under, over, and invalid values).  The
> norm is for mapping your data to those colors, however you like, by
> mapping your data to the 0-1 range (again with possible under, over, and
> invalid values).  Did you consider making a custom norm instead of
> modifying the colormap?

Yes, I did.
The problem with the default colormap is that it has not enough colors. I have 
found (I may be wrong) that no norm can change this state of affair. If you are 
able to find a norm to make my example work, i.e. to obtain the middle point in 
blue when large_value is for example 1e10, I am interested.

TP