I don't have R on this machine but will this work. myrows <- unique(ddTable[,1]) unis <- ddTable(myrows, ]
--- On Fri, 6/6/08, Emslie, Paul [Ctr] <[EMAIL PROTECTED]> wrote: > From: Emslie, Paul [Ctr] <[EMAIL PROTECTED]> > Subject: [R] Subsetting to unique values > To: r-help@r-project.org > Received: Friday, June 6, 2008, 9:35 AM > I want to take the first row of each unique ID value from a > data frame. > For instance > > ddTable <- > data.frame(Id=c(1,1,2,2),name=c("Paul","Joe","Bob","Larry")) > > I want a dataset that is > Id Name > 1 Paul > 2 Bob > > > unique(ddTable) > Will give me all 4 rows, and > > unique(ddTable$Id) > Will give me c(1,2), but not accompanied by the name > column. > > ______________________________________________ > 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.