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.
Times 2 - START HERE
Compute a dot product of two vectors x and y
Returning a "greater than" vector
y equals x divided by 2
Matlab Basics II - Log and natural log
Matlab Basics II - Determine if an array has a 3rd dimension
Matlab Basics - Set unwanted parts of a vector to zero
Matlab Basics II - Free Fall
Matlab Basics II - Intervals
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