I think "m*n" & "1*s" (or "m×n" & "1×s") may be clearer. I read "mXn" & "1Xs" firstly as variable names.
Back to basics 12 - Input Arguments
multiply by three
Summation of array
Find the average of a random sequance
Separate even from odd numbers in a vector - without loops
Vertical matrix sort
Sum of Two Numbers
Product of Each Column
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