Hello, Krisztina Szilágyi.
To make a good Cody problem there should be several (four or more) test cases within the Test Suite.
See Problem 44631 and successors for some ideas. For this specific problem it may also be interesting to ban the use of MATLAB's built-in function, which is most conveniently done by using assessfunctionabsence (see https://au.mathworks.com/help/coursework/ug/assessfunctionabsence.html ) in the Test Suite. —DIV
Find all elements less than 0 or greater than 10 and replace them with NaN
Make a random, non-repeating vector.
Longest run of consecutive numbers
Length of the hypotenuse
Find the dimensions of a matrix
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