This function returns a matrix that has been shifted n columns to the left
filling the subsqeuent columns with the given fill value
Usage
shift.left(A, cols = 1, fill = 0)
Arguments
A
a matrix
cols
integer number of columns to be shifted to the left
fill
the fill value which as as a default zero
Value
A matrix.
Note
If the argument A is not a numeric matrix, then the function presents an error message and stops.
If the argument cols is not a positive integer, then the function presents an error message and stops.