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.
Finding Perfect Squares
The Hitchhiker's Guide to MATLAB
Back to basics 5 - Clipboard
Count up then down
first element of matrix
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Matlab Basics - Logical Tests I
Matlab Basics II - Max & Index of Max
Matlab Basics II - Extract last 3 elements of a vector
Matlab Basics - Rounding I
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