How can I colour a surface plot such that one colormap is used for regions where the z-axis is greater than zero and another is used for regions where the z-axis is less than zero?

The problem has arisen because I have quite a complex and jagged surface plot and have so far been unsuccessful in being able to illustrate the behaviour of the data in a meaningful way.

I feel that if I can highlight the positive and negative regions of the surface plot it will allow me to set the viewing angle in a position that would otherwise make the height of the surface somewhat unclear, but at that same time illustrating the x-y behaviour quite well.

Thanks very much for your help - I really appreciate it!

Answer 1

[Dishant Arora]

a = [jet; gray]; % In general a = [cdata1; cdata2];
colormap(a);