Given a vector x and an integer n, convert x to a vector of length n by (1) chopping off the end if it is too long, or (2) adding zeros to the end if it is too short. If x is a character vector, then add blanks to the end instead of zeros.
I love vector problems with classically-inspired titles! Good old Procrustes...
Project Euler: Problem 5, Smallest multiple
Sum of diagonal of a square matrix
Scoring for oriented dominoes
Flip the main diagonal of a matrix
Mean ignoring NaNs
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