Modify off diagonal elements of Matrix without looping
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Commented: Chet Sharma on 17 Aug 2022
I have a MXM matrix. Is there a way to set off diagonal elements to a specified value (.e.g. I want all off-diagonal elements to be some constant "k'), without looping through the matrix? I know there is a function "diag"....was hoping to find something that does the opposite....not sucessful so far.
James Tursa on 17 Aug 2022
You could use logical indexing to get at the off-diagonal elements. E.g.,
A(~eye(size(A))) = skalar;
More Answers (1)
Bruno Luong on 17 Aug 2022
M = 4;
A = rand(M);
A(1:size(A,1)+1:end) = 10, % This is how you change the diagonal of A using linear indexing
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