Hello, Shaul Salomon. I suggest testing for an empty return variable w, rather than requiring w = , which is not the same thing. See Solution 1538012, which produces a 0×1 empty column vector. —DIV
Back to basics 21 - Matrix replicating
Whether the input is vector?
Create matrix of replicated elements
Beginner's Problem - Squaring
Find the largest number
Find the average of a random sequance
Product of Each Column
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