Threshold the matrix with vector
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Let say I have a matrix M with m x n dimensions. I want to threshold each column by different threshold. let say N contains the threshold for each column, therefore the dimension of N is n x 1 or 1 x n.
how can I do this by single command.
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Junaid
2012-10-8
One possible way is ..
lets us assume that N is 1 x n vector
N = repmat(N,size(M,1),1);
M_binary = M > N;
or
M_binary = M < N;
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Wayne King
2012-10-8
编辑：Wayne King
2012-10-8
A = randn(5,3);
n = [0.5 0.8 0.2];
thresh = bsxfun(@gt,A,n);
B = A.*thresh;
B contains nonzero elements only where elements in A exceed the thresholds in the vector n.
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