Hi Carrie, Try
> x <- rle(a) > rep(x$lengths, x$lengths) [1] 1 2 2 1 HTH, Jorge On Sun, Feb 6, 2011 at 8:21 PM, Carrie Li <> wrote: > Hello R-helpers, > > I have a question about counting numbers. > Here is a simple example. > > a=c(2, 3, 3,4) > > table(a) > a > 2 3 4 > 1 2 1 > > so, I can to create another variables that has the corresponding counting > numbers. > In this case, I want to have: > > b=c(1,2,2,1) > > Is there any way coding for this ? > > Thanks for helps! > > Carrie-- > > [[alternative HTML version deleted]] > > ______________________________________________ > 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. > [[alternative HTML version deleted]] ______________________________________________ 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.
