Duplicate a character 'n' times.
Example 1: str='a' n=5
Example 2: str='*' n=3
n is a nonnegative interger.may it be the largest problem that i meet.
My initial solution with repelem(str,n) for n=0 creates a size 1x0 char class but suite only allows for a 0x0 class. Not sure why the difference would matter.
Extract leading non-zero digit
Tell me the slope
Arrange Vector in descending order
Set the array elements whose value is 13 to 0
Product of elements in row
Moving average (variable kernel length)
Remove entire row and column in the matrix containing the input values
Change the sign of even index entries of the reversed vector
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