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2010 Nov 07
3
regular exprs
Dear All,
I would appreciate any help with the following: given the vector 'x'
x <- c("Ass1", "Ass.s1", "Ass2", "Ass.s2")
I would like to pick up the positions where the character string
contains "Ass" but does not contain "Ass.s", so for 'x' that would be
positions 1 and 3.
I guess this could be programmed around grep() u...