Counting number of zeros in column or row, without looping

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Ulrik Nash
Ulrik Nash le 8 Juil 2011
Hi Everyone,
If I have a matrix A, is there a way to create a 1,c vector containing the number of non-zeros in each columns, and simillarly, a r,1 vector containing the number of non-zeros in each row, all without looping?
Perhaps some use of nnz I am unaware of?
Regards,
Ulrik

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Nathan Greco
Nathan Greco le 8 Juil 2011
Given A:
idx = A~=0;
c = sum(idx,1);
r = sum(idx,2);

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