J-G, thanks for the problem. Could you add some more information about expected inputs and outputs? An example and some more tests would be helpful too. If your test suite has exactly one test, it's trivial to write a correct answer.
Test for balanced parentheses
02 - Vector Variables 3
Matlab Basics - Set unwanted parts of a vector to zero
Wayfinding 3 - passed areas
Only once: cleaning up your columns
Create a random vector of integers with given sum
Convert nested struct-array to numeric array
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