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.
Back to basics 21 - Matrix replicating
Find out sum of prime number till given number
Sum of series II
prime test 2
Matlab Basics - Rounding III
Matlab Basics - Assigning Variables
Matlab Basics II - Max & Index of Max
Matlab Basics II - 3 Dimensional Arrays
Matlab Basics - Convert a row vector to a column vector
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