Given a matrix M and two index vectors a and b, return a row vector x where x(i) = M(a(i),b(i)).
Find all elements less than 0 or greater than 10 and replace them with NaN
Determine if a Given Number is a Triangle Number
Project Euler: Problem 6, Natural numbers, squares and sums.
Put two time series onto the same time basis
Reference Index Number
Cell Source Index
Create a patchwork matrix
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