Matlab - setting up the scale in imagesc automatically

Question

I am trying to compare plots that I create by matlab imagesc, and hence need the color limits to be identical to the higher one.

I tried digging, but couldn't find an easy way to do that, or at least figure out the limits without opening the colormap editor.

Thanks much for any help!

Alon.

Answer 1

You can set the limits of the color-scale using caxis

img1 = randn(100);
img2 = rand(100);

%# find global min/max
clim(1) = min(min(img1(:)),min(img2(:)));
clim(2) = max(max(img1(:)),max(img2(:)));

figure
ah1 = axes;
imagesc(img1)
caxis(ah1,clim)

%# show the other figure set the same limits to colormap
figure
ah2 = axes
imagesc(img2);
caxis(ah2,clim)