Given a input vector x, return y as index-powered vector as shown below.
x = [2 3 6 9]
then y should be
[2^1 3^2 6^3 9^4] = [2 9 216 6561]
Find the index of n in magic(n)
Vectors counting by 2
Best Fit RMS
Create a matrix with difference of each row of input matrix
Back to basics - array operations
Find and replaces spaces from a input string with *
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