Note: What is required here is squaring the elements in the matrix, which is not the same as squaring the matrix.
Select every other element of a vector
Back to basics 21 - Matrix replicating
Find the index of the largest value in any vector X=[4,3,4,5,9,12,0,4.....5]
Divisible by 2
Vectors counting by 2
Deleting an element in a matrix
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