% get number column and rows of a data matrix mymatrix = zeros(3,4) [Nrow,Ncol]=size(mymatrix) % get all permutations (Cartesian product) [X,Y] = meshgrid(1:Nrow,1:Ncol) xy_pairs = [X(:) Y(:)] 1 1 1 2 1 3 1 4 2 1 2 2 2 3 2 4 3 1 3 2 3 3 3 4 % exclude diagonal (1,1) (2,2) .. and inverse pairs xy_pairs = xy_pairs( xy_pairs(:,1) < xy_pairs(:,2) ,:) 1 2 1 3 1 4 2 3 2 4 3 4 |
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