Create a vector from 0 to n by intervals of 2.
Function names cannot begin with a number. Also, this is an extremely simple problem that has been posted many times. Please put more thought into problems before posting them.
I changed the problem slightly and added some more test cases.
2 b | ~ 2 b
Make a run-length companion vector
Rotate input square matrix 90 degrees CCW without rot90
Replace multiples of 5 with NaN
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