Please improve the test suite. There are two glaring problems. First, there is only one test case—it is recommended that at least three be provided, though more are often necessary to prevent hard-coded workarounds. Second, do not provide the solution in the test case(s). For such a problem, the answer should be calculated beforehand and provided as a predefined number to hide the solution. Furthermore, candidate functions can be checked against the solution using an adequate error bound (perhaps within 1E-3) rather than isequal().
Most nonzero elements in row
Check that number is whole number
Matlab Basics II - Minimum
Find remainder when x is divided by 3
Automatic String Editing
Find the index of the lowest number in a matrix
Vector Element Multiplication
Check if inputted variable is a string or a number
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