Try this: subset(foo, v3 %in% names(which(!table(foo$v3) < 3)))
On Wed, Mar 24, 2010 at 10:38 AM, Oscar Franzén <oscar.franz...@gmail.com> wrote: > Dear all, > > I'm trying to find a a way to remove certain fields belonging to the same > group from a data frame structure. > > I have a data frame like this: > > foo v1 v2 v3 > 1 1 a > 6 2 a > 3 8 a > 4 4 b > 4 4 b > 2 1 c > 1 6 d > > Each row can then be grouped according to the third column: a, b, c, d. Then > I would like to remove all fields that belong to a group with less than X > members, for example less than 3 members, then > the resulting data frame structure would look like: > > > foo v1 v2 v3 > 1 1 a > 6 2 a > 3 8 a > > Is there some simple way to do this in R? > > Thanks in advance. > /Oscar > > [[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. > -- Henrique Dallazuanna Curitiba-Paraná-Brasil 25° 25' 40" S 49° 16' 22" O ______________________________________________ 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.
