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.
Create a vector whose elements depend on the previous element
Say something funny
Generate a random matrix A of (1,-1)
Try 1.5.4: Celsius to Fahrenheit
Only once: cleaning up your columns
Operate on matrices of unequal, yet similar, size
Wayfinding 2 - traversing
Insert certain elements into a vector.
Order of things - 1
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