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Access matrix location on one matrix with the data location on another matrix

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Rohan Mehta
Rohan Mehta 2019-6-21
编辑： madhan ravi 2019-6-21
I have two matrix say A & B if I have data stored in A and the data location of desired values in B how could I access Values of matrix A who are located at locations B.

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Chinmay Anand
Chinmay Anand 2019-6-21
In case if A and B are vectors ,( 1 x n ) matrices
A(B) % It will give the values of A at indexes B
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madhan ravi
madhan ravi 2019-6-21
Probably you want:
idx = setdiff(1:numel(A),B);
A(idx) = 0;

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