creating a pcolor plot to map coherence

Hi guys, maybe you can help me out with this one. I've been racking my brain for days on this minor task. I have a bunch of random signals I created and I have data for their coherence (which is 2696 in length) with the original signal they were created from. I want to create a pcolor plot that has the frequency on the y axis and the record number (which is just from 1 to 100 on the x axis). So essentially I have the coherences, which are 2696x100 (for the 100 coherences), the frequency and the record numbers. Here is the code I had so far

if true
pcolor(ones(100,1),rand1(1:100,1:2696),cxy1(1:100,1:2696))
end

I'm getting an Index exceeds matrix dimensions error. Any tips?

Answer 1

[Walter Roberson]

Are you sure that you are getting "index exceeds matrix dimension" and not "matrix dimensions must agree"?

If you use a vector for X then you must also use a vector for Y. If you use a matrix for Y then you must use a matrix for X.

You may wish to use

X = ndgrid(1:size(rand1,1),1:size(X,2));
pcolor(X, rand1, cxy1);