How to replace diagonal of square matrices within a cell array?

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Adnan Habib
Adnan Habib 2021-9-11
评论： Star Strider 2021-9-13
I have a 940X1 cell array where each element is a 298X298 square matrix. I want to replace the main diagonals of each square matrix with zero. Is there a way to do it?

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Star Strider
Star Strider 2021-9-11
Ran in:
The easiest way is to subtract the diagonal of each matrix from the matrix —
C = {rand(4); rand(4); rand(4)}
C = 3×1 cell array
{4×4 double} {4×4 double} {4×4 double}
Cr = cellfun(@(x) x-diag(x), C, 'Unif',0)
Cr = 3×1 cell array
{4×4 double} {4×4 double} {4×4 double}
Cr{1}
ans = 4×4
0 0.5651 0.1597 0.4081 0.0049 0 -0.5032 0.3582 0.4049 0.8147 0 0.2985 -0.4793 -0.4366 -0.5270 0
Cr{3}
ans = 4×4
0 0.2540 -0.2275 -0.0101 0.1521 0 -0.7862 -0.3234 0.5575 -0.0462 0 -0.1965 -0.4953 -0.3632 -0.5305 0
Make appropriate changes to get different results.
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