Using explicit iteration is not the most efficient way of solving this problem, but if you do choose to iterate I would suggest using "linear indexing", per https://au.mathworks.com/help/matlab/math/matrix-indexing.html?s_tid=doc_srchtitle#f1-85511
Omit columns averages from a matrix
Back to basics 14 - Keywords
matrix of natural number
Remove All elements less than 5
Delete the column with all 0 in the TABLE
Delete the column with all 0 !
Probability of red tulips (at both ends of a row)
Average of even-numbered columns
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