e.g for input x: [ 7 3 9 5]
output y: [ 7 3 3 9 9 9 5 5 5 5]
First non-zero element in each column
Back to basics 21 - Matrix replicating
Output any real number that is neither positive nor negative
Area of a triangle
Test if a number is numeric or not
Pad zero between every adjacent values of the vector.
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