In view of the recent spate of trivial problems with no test suite to speak of, thanks for making the effort of providing a proper test suite and a slightly less trivial problem.
So many choices
Back to basics 12 - Input Arguments
05 - Vector Equations 1
Determine the length of a string of characters
Matlab Basics - Assigning Variables
Matlab Basics - Logical Tests I
Matlab Basics - Set unwanted parts of a vector to zero
Matlab Basics II - Operations and Matrix Dimensions
Matlab Basics II - Log and natural log
Matlab Basics II - Determine if an array has a 3rd dimension
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