This would be better as "find the nth element of an array." Also, a column matrix doesn't exist. Perhaps you meant column vector, though the variables in your test cases are row vectors.
Remove the air bubbles
Find the Nth Root of a Given Number
Matlab Basics II - Intervals
Convert yards to feet
find the mean of all elements in a matrix
modulus of a number
Find remainder when x is divided by 3
Find the last digit
multiply an array by its position number
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