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find non zero elements put in a matrix

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babis
babis on 5 Dec 2013
Answered: Wayne King on 5 Dec 2013
i have a matrix and i want to take the row number of every non-zero element per collumn into a new matrix

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Answers (1)

Wayne King
Wayne King on 5 Dec 2013
A = randi([-2 2],20,10);
idx = find(A~=0);
B = A(idx);
B contains all the nonzero elements of A, but how will you know the size of the matrix ahead of time?

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