MATLAB: Which MATLAB function can remove the diagonal elements of a NxN matrix

diagonalmatrix

Do you know which MATLAB function can do the following work: to remove the diagonal elements of a (N+1)x(N+1) matrix to generate a new NxN matrix.
For say, the old matrix is
[ 0  1  2  3
  1  0  2  3
  1  2  0  3
  1  2  3  0 ]
the generated new matrix is
[ 1  2  3
  1  2  3
  1  2  3 ]

Best Answer

Your example doesn't add up, as Kenneth mentioned. However, in general you could do something like this:
A = [ 0 1 2 3
1  0  2  3
1  2  0  3
1  2  3  0 ];
A(logical(eye(size(A)))) = []; % Or A = A(~eye(size(A)))
A = reshape(A,4,3);  % Or 3,4 or whatever.
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