A,B,C same size matrixes. A & C are double elements, B is with logical elements.How do I simply set A with values found in C only for true (or false) positions in B?

Question

Andy 2017-8-24

0
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https://ww2.mathworks.cn/matlabcentral/answers/353854-a-b-c-same-size-matrixes-a-c-are-double-elements-b-is-with-logical-elements-how-do-i-simply-set

回答： Jan 2017-8-24

Setup:

if true
  A = zeros(4,4); 
  C = [1,2,3,0; 5,0,6,4; 9,7,0,4; 2,0,5,6];
  B = false(4,4); B(2,4) = 1; B(3,2) = 1; B(1,1) = 1;
end

How do I easily set A to copy values from C only for elements in B that are false (or true)? End result (for filtering by false value) should be: A = [0,2,3,0; 5,0,6,0; 9,0,0,4; 2,0,5,6]; Basically, we copied elements from C where B position was false/zero.

Thx