find the first elements of a column matrix
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.
Back to basics 23 - Triangular matrix
Doubling elements in a vector
Count up then down
02 - Vector Variables 2
vector to string
Calculating selling price
find a specific element from an matrix
multiply an array by its position number
find the mean of all elements in a matrix
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