hi steffi, try DataSort<-Data[order(Data[,5],Data[,6],Data[,8]),1:14]
and for further details ?order. For matching try ?merge. Best Regards, Christian Stefanie von Felten, IPW&IfU schrieb: > Hello everyone, > > I want to sort a dataset in R, using multiple columns as sorting > criteria. I know I can sort a dataset "Data" with 14 columns using one > column (the fifth), by typing: > > DataSort<-Data[order(Data[,5]),1:14] > > But how can the dataset be sorted by column 5, then by 6, then by 8? > > Another question is, how two datasets can be matched by a column present > in both of them? > > Steffi -- Dr. Christian Montel Eligo GmbH - Büro Berlin Friedrichstr. 90 10 117 Berlin Fon (030) -- 20 25 31 94 Fax (030) -- 20 25 33 33 e-mail: [EMAIL PROTECTED] http://www.eligo.de/ ______________________________________________ [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
