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 -- --------------------------------- Stefanie von Felten Doktorandin ETH Zürich Institut für Pflanzenwissenschaften ETH Zentrum, LFW A 2 Telefon: 044 632 85 97 Telefax: 044 632 11 53 e-mail: [EMAIL PROTECTED] http://www.ipw.agrl.ethz.ch/~svfelten/ und: Universität Zürich Institut für Umweltwissenschaften Winterthurerstrasse 190 8057 Zürich Telefon: 044 635 61 23 Telefax: 044 635 57 11 e-mail: [EMAIL PROTECTED] http://www.unizh.ch/uwinst/homepages/steffi.html ______________________________________________ [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
