computeChar_rindex: Locate position of last occurence of a pattern
Description
Helper Function for xpssCompute. R Implementation of the SPSS CHAR.RINDEX Function.
Usage
computeChar_rindex (x,pattern = NULL, split = 0)
Arguments
x
atomic character or character vector.
pattern
atomic character to look for.
split
numeric. Number of parts pattern to divide to.
Value
Numeric. Position of the last occurence of the pattern
Details
computeChar_index(x="Hello user", pattern="user") Returns a number indicating the character position of the last occurrence of the first letter of 'user' in 'Hello user'. The optional third argument, split, is a number, which must be a positive integer used to divide 'user' into separate strings. The split value must be able to divide the pattern string without remainder.