I want to sample within groups, and when a group has only one associated number to just return that number.
If I use this code: groups <- c(1, 2, 2, 2, 3) numbers <- 1:5 tapply(numbers, groups, FUN = sample) I get the following output: > groups <- c(1, 2, 2, 2, 3) > numbers <- 1:5 > tapply(numbers, groups, FUN = sample) $`1` [1] 1 $`2` [1] 3 2 4 $`3` [1] 2 3 5 1 4 Can someone tell me why the $'3' result samples all of the numbers and how to prevent it from doing so? I want the output for the $'3' part to just be 5 in this example. Thanks for your help. > sessionInfo() R version 2.11.1 (2010-05-31) i386-pc-mingw32 -- View this message in context: http://r.789695.n4.nabble.com/sample-within-groups-slight-problem-tp3794912p3794912.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.
