Covering some basic topics I haven't seen elsewhere on Cody.
Given an input matrix, generate an output matrix that consists of the input matrix replicated in a 2 by 2 pattern Examples:
[1] -> [1 1
1 1]
[1 2 -> [1 2 1 2
3 4] 3 4 3 4
1 2 1 2
3 4 3 4]
Omit columns averages from a matrix
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