I want to sample from the ID. For each ID, i want to have 2 set of data. I try the sample() function but it didn't work.
> x<-data.frame(id=c(1,1,1,2,2,2,2,3,3,3,4,4), v1=c(1:12), V2=c(12:23)) > x id v1 V2 1 1 1 12 2 1 2 13 3 1 3 14 4 2 4 15 5 2 5 16 6 2 6 17 7 2 7 18 8 3 8 19 9 3 9 20 10 3 10 21 11 4 11 22 12 4 12 23 -- View this message in context: http://r.789695.n4.nabble.com/sampling-tp3310184p3310184.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.
