> S=c("World_is_beautiful", "one_two_three_four","My_book")
> I need to extract the last but one element of the strings. So, my
> output should look like:
> Ans=c("is","three","My")
> gsub() can do this...but wondering how do I give the regular
expression....
sapply(strsplit(S, "_"), function(x) x[length(x)-1])
You could use regular expressions, but I think it would only be
complicating things.
Regards,
Richie.
Mathematical Sciences Unit
HSL
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