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.
Generate a vector like 1,2,2,3,3,3,4,4,4,4
Sum the 'edge' values of a matrix
Matlab Basics II - Count rows in a matrix
UICBioE240 problem 1.2
modulus of a number
find a specific element from an matrix
Find the last digit
Determine whether the input is divisible by 3 as well as 5
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