Replicate each element of a row vector (with NaN) a constant number of times.
n=2, A=[1 2 3] -> [1 1 2 2 3 3]
n=0, A=[2 1] -> 
Back to basics 19 - character types
Who has power to do everything in this world?
convert matrix to single column
Add more zeros
Pandigital number n°2 (Inspired by Project Euler 32)
Magic is simple (for beginners)
Chess ELO rating system
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