Write a script that returns the absolute value of the elements in x
e.g. x = [-1 -2 -3 -4] --> y = [1 2 3 4]
'Write a script'. Actually, they're functions.
Swap two numbers
Matlab Basics - Rounding I
Square root of a number
Matlab Basics II - Free Fall
Matlab Basics - Logical Tests I
Finding an element in a vector
Replace every 3rd element in a vector with 4
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