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I want to extract half of the non-zero element of a matrix

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BANI tita
BANI tita 2012-10-14
Hello, I have a matrix of the following form: [1,0,0,0;0,0,0,0;0,10,0,12;13,0,0,0], I need a mask that allows me to extract half of the data of each nonzero matrix of this form in this case for example I want the following result [1,0,0,0;0,0,0,0;0,10,0,0;0,0,0,0]

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回答（2 个）

Matt J
Matt J 2012-10-14
idx=find(A);
A(idx(2:2:end))=0;
Andrei Bobrov
Andrei Bobrov 2012-10-14
ii = 1:fix(nnz(A)/2);
At = A';
jj = find(At);
At(jj(fix(nnz(A)/2)+1:end)) = 0;
out = At';

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