Hi > -----Original Message----- > From: r-help-boun...@r-project.org [mailto:r-help-bounces@r- > project.org] On Behalf Of Rosario Garcia Gil > Sent: Wednesday, September 11, 2013 12:21 PM > To: r-help@r-project.org > Subject: [R] resample from data frame: unlinked columns > > Hello > > I am trying to resample from this data set (see below). The function I > am using so far is doing it by considering A and B columns as linked. I > used this function. > > >NUCh_rep<- > replicate(500,data[sample(1:nrow(data),replace=T),],simplify=F)
Sample rows 1000 times and use two parts of this index ind<-sample(1:nrow(data), 1000, replace=TRUE) data[ind[1:500], "A"] data[ind[501:1000], "B"] You can organize it to data frame or matrix e.g. result <- cbind(data[ind[1:500], "A"], data[ind[501:1000], "B"]) Regards Petr > > What I need is to resample (500 times) with replacement but considering > A and B columns UNLINKED. Any advice it is most appreciated. Thanks. > > A B > 5 257 259 > 10 257 259 > 10.1 257 259 > 4 257 259 > 9 257 259 > 2 257 259 > 8 257 259 > 1 257 259 > 8.1 257 259 > 8.2 257 259 > 7 255 257 > > > [[alternative HTML version deleted]] > > ______________________________________________ > 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.
