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.
Determine whether a vector is monotonically increasing
Getting logical indexes
Create incrementing array
Deleting an element in a matrix
Matrix of almost all zeros, except for main diagonal
Matlab Basics II - Max & Index of Max
Matlab Basics - Pick out parts of a vector
Matlab Basics II - Find the roots of a function
Matlab Basics II - squares
Matlab Basics - Switching Assignments
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