Try this: > x <- c(1, 2, 3, 3, 4, 5)
> ave(x, x, FUN = length) > 1 [1] FALSE FALSE TRUE TRUE FALSE FALSE On Thu, Oct 1, 2009 at 10:42 PM, Peng Yu <pengyu...@gmail.com> wrote: > Hi, > >> x=c(rep(1,3),rep(3,2)) >> x > [1] 1 1 1 3 3 >> duplicated(x) > [1] FALSE TRUE TRUE FALSE TRUE >> > > As shown in the above code, 'duplicated' doesn't return 'F' for the > first '1' and first '3' in 'x'. I am wondering if there is a function > that can return an indicator for any element whether it appears in a > vector twice or more. > > Regards, > Peng > > ______________________________________________ > 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. > ______________________________________________ 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.
