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.
give nth decimal place of pi
Create a vector whose elements depend on the previous element
Make a 1 hot vector
07 - Common functions and indexing 1
Find remainder when x is divided by 3
find the mean of all elements in a matrix
modulus of a number
Find the last digit
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