could you perhaps add a test where the minimum is not in the first column and it is not at the same place in all of the rows? For example: A = [4,5,3,2; 2,1,3,4]; B_correct = [4,5,3,3.5; 2,2.5,3,4];
First non-zero element in each column
Create an index-powered vector
multiply by three
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