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Replace an element in a matrix if it's a member of an array with zero

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I have a matrix A and an array B, I want to find any element in A that exist in B and replace it with zero. Any idea? Thanks

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michio il 14 Dic 2016
ismember function can do the job. As it's stated in the doc page, "Lia = ismember(A,B) returns an array containing logical 1 (true) where the data in A is found in B."
Please try the following do see what it does.
b = magic(4)
a = [1,2,3,4];
I = ismember(b,a)
b(I) = 0

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