find non zero elements put in a matrix

i have a matrix and i want to take the row number of every non-zero element per collumn into a new matrix

回答(1 个)

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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提问:

2013-12-5

回答:

2013-12-5

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