CODEWITHSUNDEEP
matlabmatrixcorrelation
SMH
SMH

Reputation: 1316

Calculating the correlation of 2D signals with different sizes

I am trying to calculate the correlation between two different signals and it works perfect if the signals have the same size. But it gives an error if there size is different. So I am wondering if there is any way that I can change the size of one to the other so they can have the same size? Any Help??

As example:

If signal 1 is a matrix of size 130X9 and signal 2 is another matrix of size 122X12 and they look the same .. so what I need is to scale one of them to the other, so both of them can be of size 130X9 or 122X12.

My code:

norm_xcorr_mag = @(x,y)(max(abs(xcorr(x,y)))/(norm(x,2)*norm(y,2)));
norm_xcorr_mag(signal1,signal2);

Upvotes: 1

Views: 94

Answers (1)

Rash
Rash

Reputation: 4336

If you have signal processing toolbox,

A = randi(100,[130 9]);
B = randi(100,[122 12]);
MaxRow = max(size(A,1),size(B,1));
MaxCol = max(size(A,2),size(B,2));
NewA = resample(A,MaxRow,size(A,1));
NewB = resample(B,MaxRow,size(B,1));
NewA = resample(NewA',MaxCol,size(A,2))';
NewB = resample(NewB',MaxCol,size(B,2))';

NewA and NewB are both 130x12

You could also try intrep1.

Upvotes: 1

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