Calculate the sum of the eigenvalues of A. If it's odd return cubed else return 54.
Find all elements less than 0 or greater than 10 and replace them with NaN
Project Euler: Problem 1, Multiples of 3 and 5
Sum the elements in either diagonal of a square matrix
Replace values under a limit
Find Adjacency Matrix
Find the sum of the negative elements under the main diagonal.
Find matrix of indices for multidimensional matrix.
Check if a string starts with another string
Return ! if array element starts with a certain letter. Otherwise return ?
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