if you want the first row for the unique 'aa' entries, try the following: cc[!duplicated(cc$aa), ]
I hope it helps. Best, Dimitris ---- Dimitris Rizopoulos Ph.D. Student Biostatistical Centre School of Public Health Catholic University of Leuven Address: Kapucijnenvoer 35, Leuven, Belgium Tel: +32/(0)16/336899 Fax: +32/(0)16/337015 Web: http://med.kuleuven.be/biostat/ http://www.student.kuleuven.be/~m0390867/dimitris.htm Quoting Lanre Okusanya <[EMAIL PROTECTED]>: > hello all, > > I have a dataset where the subjects are duplicated. How do I subset > such that I can get only I row/subject. > > aa<-c(1,1,2,2,3,3,4,4,5,5,6,6) > bb<-c(56,56,33,33,53,53,20,20,63,63,9,9) > cc<-data.frame(aa,bb) > > I would like to subset df(cc) such that I can get > aa bb > 1 56 > 2 33 > 3 53 > 4 20 > 5 63 > 6 9 > > I know this should be fairly easy but I can't figure how to do it in a > dataframe and keep all my columns > > Thanks > > ______________________________________________ > [email protected] 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. > > Disclaimer: http://www.kuleuven.be/cwis/email_disclaimer.htm ______________________________________________ [email protected] 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.
