Please improve the test suite. There is only one test case—three is a recommended minimum, though more may be necessary to completely and adequately test what is being asked.
Generate a NaN...on purpose
Is the input divisible by 3?
Length of a short side
Test Problem; Create a 5x5 array containing all ones
true or false
String Delimination and Outputting
Find the index of the lowest number in a matrix
Matrix Generation from Vector Multiplication
Simple Vector Addition
Find the sum of the largest two elements in a vector
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