The Problem it is not challenging if the solution is provided openly in the Test Suite. See Problems 44617, 44616 & 44521 for discussion of some relevant details.
The solution is openly provided. Please change the test suite.
Find all elements less than 0 or greater than 10 and replace them with NaN
The Hitchhiker's Guide to MATLAB
How to subtract?
Return the first and last characters of a character array
Generate a NaN...on purpose
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