Change 1 to -1 in a matrix
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Hi to all the members, I have a 4 X 4 Matrix of one i.e ones(4). I want to change all the elements from 1 to -1 randomly in the matrix. BUT Only one element should change at a time from 1 to -1. That it the 1 changes to -1 sixteen times as we have sixteen elements in the matrix.
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