On Feb 11, 2014, at 5:26 AM, Val wrote: > Hi all, > I have a sample of data set with variables day, ID,var and month: > day ID var Month > 1 11 x March > 1 11 x March > 1 11 x April > 1 11 y March > 1 11 x March > 1 11 y March > 2 11 x March > 2 11 y March > 3 11 x March > 3 11 y March > 4 11 y March > > In the above data set there are four unique days within ID. For example > ID "11" has four records on day 1 and if this ID has "y" in "March" then I > want keep "y" and discard "xs". Is it possible to keep them in two data > sets ( wanted and unwanted) > The output for wanted data set will be: > > 1 11 y March > 1 11 x April > 1 11 y March > 2 11 y March > 3 11 y March > 4 11 y March > thanks in advance
Perhaps: wanted <- dat[!duplicated(dat), ] unwanted <- dat[duplicated(dat), ] ?duplicated -- David. David Winsemius Alameda, CA, USA ______________________________________________ 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.
