why this code is not correct?
s = summ(v)
sorry mate, this is unfair for those who actually came up with a compact solution
No need to be sorry.
Personally I think the regexp should be always forbidden.
I used it (and I had never thought about it before) because it seems that everyone is using it.
How to subtract?
Make a random, non-repeating vector.
Matlab Basics - Absolute Value
Approximate the cosine function
Triangle of numbers
Vertical matrix sort
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