Hi r-help-boun...@r-project.org napsal dne 06.04.2009 11:54:27:
> > Hi, > I ve been searching a lot in internet..but I can t find a solution > Attached, you find a file. > I need for each (Materiale, tpdv, UM) to find sum,avg and count > My idea was to aggregate for the 3 parameters ..but I don t know how to get > the numeric value (SUM,COUNT,AVG) I need. ?sum ?mean ?length Aggregate works with one value only but you can try doBy package or split/lapply approach. Regards Petr > Can you help me? > thank you > > http://www.nabble.com/file/p22905601/ordini2008_ex.txt ordini2008_ex.txt > -- > View this message in context: http://www.nabble.com/read.table-tp22905601p22905601.html > Sent from the R help mailing list archive at Nabble.com. > > ______________________________________________ > 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.