x is a vector of unknown length
your function should return the index of the first element in the vector that is greater than 6. If all elements in x are less than 6, the function should return 'none'
example: x = [1 2 7 2 3 2 4 8 6]
output = 3
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.
Basics: 'Find the eigenvalues of given matrix
Number of digits in an integer
Element by element multiplication of two vectors
Divide by 4
Matlab Basics II - squares
Matlab Basics II - Max & Index of Max
Matlab Basics II - 3 Dimensional Arrays
Matlab Basics - Absolute Value
Matlab Basics - Logical Tests I
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