On Mon, Sep 27, 2010 at 7:29 PM, Gabor Grothendieck <ggrothendi...@gmail.com> wrote: > Try this zero width negative look behind expression: > >> gregexpr("(?!a+)(b+)", "abcdaabbc", perl = TRUE) > [[1]] > [1] 2 7 > attr(,"match.length") > [1] 1 2
Thanks Gabor, but this gives me the same result as gregexpr("b+", "abcdaabbc", perl = TRUE) which is wrong if the string is "abcdaabbcbbb". Titus ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.