I have a 2x10 matrix and I want to select a random element from each row. I have found how to select random elements from the matrix as a whole but can't narrow it down.
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Randperm is a simple helper for this:
X = [1:10; 11:20]; idx1 = randperm(10); idx2 = randperm(10); entries = [X(1,idx1(1)); X(2, idx2(1))]