how to extract special elements from a matrix
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Hi, I have a matrix, let say M1 = [1,0,0,8;0,0,15,0;0,0,0,0;7,0,0,0].
How can I extract only non-zero elements to another matrix M2.
Thank you.
回答（2 个）
Andrei Bobrov
2012-10-13
M2 = nonzeros(M1);
Walter Roberson
2012-10-13
M2 = M1(M1 ~= 0);
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