Thank you Christos and Jim: That is precisely what I was after.
On Sat, 3 May 2008 00:01:58 -0400, "Christos Hatzis" <[EMAIL PROTECTED]> said: > Try %in% > > subset(dat, treatment %in% vec) > > > -----Original Message----- > > From: [EMAIL PROTECTED] > > [mailto:[EMAIL PROTECTED] On Behalf Of > > [EMAIL PROTECTED] > > Sent: Friday, May 02, 2008 11:41 PM > > To: r-help@r-project.org > > Subject: [R] help with subset > > > > Dear list: > > > > I have a problem using the subset function: > > > > dat<- data.frame(treatment=c("A", "B", "A", "C", "C", "D", > > "A", "D", "C", "D"), response=rnorm(10)) > > > > I am interested in treatments "A", "B" and "D" > > vec<- c("A", "B", "D") > > > > But I can only obtain what I want with: > > subset(dat, treatment=="A" | treatment=="B" | treatment=="D") > > > > What's wrong with > > subset(dat, treatment==vec) > > > > It would be much more simple to compute the latter in a > > rather complex dataframe. > > Thanks in advance > > Justin > > -- > > > > [EMAIL PROTECTED] > > > > -- > > > > ______________________________________________ > > 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. > > > > > > -- [EMAIL PROTECTED] -- wherever you are ______________________________________________ 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.