From a usability point of view, returning a string to indicate nothing found is probably the worst. an empty value or 0 would be much better.
Guillaume, I would say that that depends upon the intended 'audience' for the output.
Find common elements in matrix rows
Right and wrong
Sum of series II
Matlab Basics - Switching Assignments
Matlab Basics - Assigning Variables
Matlab Basics II - Extract last 3 elements of a vector
Matlab Basics - Convert a row vector to a column vector
Matlab Basics II - Minimum
Matlab Basics II - Operations and Matrix Dimensions
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