I want the 0s to be at the end or beginning.
> -----Original Message----- > From: Erik Iverson [mailto:er...@ccbr.umn.edu] > Sent: Wednesday, April 28, 2010 5:21 PM > To: arnaud Gaboury > Cc: r-help@r-project.org > Subject: Re: [R] data frame move columns > > > > avprix <- > > structure(list(DESCRIPTION = c("CORN Jul/10", "CORN May/10", > > "ROBUSTA COFFEE (10) Jul/10", "SOYBEANS Jul/10", "SPCL HIGH GRADE > ZINC USD", > > > > "STANDARD LEAD USD"), prix = c(-1.5, -1082, 11084, 1983.5, -2464, > > -118), quantity = c(0, -3, 8, 2, -1, 0), fees = c(-8.64, -30.24, > > -26.4, -25.92, -37.5, -25)), .Names = c("DESCRIPTION", "prix", > > "quantity", "fees"), row.names = c(NA, -6L), class = "data.frame") > > > > I want to group together all the rows with quantity=0. > > > > This following line does the job : > > > >> avprix<- > rbind(avprix[!avprix$quantity==0,],avprix[avprix$quantity==0,]). > > > > > > If you don't care that the 0s are at the end, but rather just grouped, > just use 'order'. > > avprix[order(avprix$quantity),] ______________________________________________ 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.
