symmetric color map using surf

Hi there,

I would like to show in a graph a symmetric color driving from 0 green to either + and - to red. The peak at the bottom should be in colour yellow again.

All areas around 0 in green. Anyone an Idea? Cheers

[KSSV]

Make your colormap data and try..read bout colormap

[Peter Wagner]

Thanks! colormap worked!

Answer 1

[Akira Agata]

Like this?

cmap = interp1([-1;0;1],[1 0 0;0 1 0;1 0 0],linspace(-1,1)');

surf(peaks)
colormap(cmap)
colorbar

[Peter Wagner]

very nice code! code

Answer 2

[Neil Lamas]

Here is an alternative using the color libraries from matlab:

cmap_pos = jet(64);
cmap_neg = flipud(cmap_pos);
cmap = [cmap_neg; cmap_pos];

surf(peaks)
colormap(cmap)
colorbar