Replacing values in a matrix based on values in another matrix

2022 8 15
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If I have a matrix with "1"s and "0"s (A) and other matrixes of the same size with other values (B,C,D, etc), is it possible to find the locations of the "1"s in A in B,C,D,etc and replace these values with a constant number while the other values in B,C,D, etc are uneffected?
Thanks in advanced!

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Cris LaPierre
Cris LaPierre 2022-8-15
Ran in:

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Ran in:
Use logical indexing (see Ch 11 of MATLAB Onramp)
A = [0 1 1 0]
A = 1×4
0 1 1 0
B = rand(size(A))
B = 1×4
0.1915 0.9248 0.8352 0.2674
B(A==1) = 99
B = 1×4
0.1915 99.0000 99.0000 0.2674

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