Additional test cases have been added.
The title and description/instruction should refer to finding and outputting "means" (plural), not "the mean" (singular). Also, it would have been good for the Test Suite to include both row and column vectors, appropriately paired.
Right and wrong
Project Euler: Problem 6, Natural numbers, squares and sums.
Find out total non zero element of matrix
Replace 0 indices in array with 1's
More Simple String Concatenation
Matrix Generation from Vector Multiplication
Sum two matrices
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