Simon Blomberg <s.blomberg1 <at> uq.edu.au> writes: > > My solutions are usually too baroque, but does this do what you want? > > x <- rnorm(100) > quants <- quantile(x, c(.3, .7)) > Case <- rep(2, length(x)) # 2 lies in the middle of the distribution > Case[x <= quants[1]] <- 0 > Case[x >= quants[2]] <- 1 > Case > > On Mon, 2007-06-11 at 15:14 -0700, Jiong Zhang, PhD wrote: > > Hi all, > > > > I have a rather naive question. I have the height of 100 individuals in > > a table and I want to assign the tallest 30% as Case=1 and the bottom > > 30% as Case=0. How do I do that? > >
Or, how about, x <- rnorm(100) Case <- cut(x, quantile(x, c(0, 0.3, 0.7, 1)), c(0, 2, 1), TRUE) ken -- Ken Knoblauch Inserm U846 Institut Cellule Souche et Cerveau Département Neurosciences Intégratives 18 avenue du Doyen Lépine 69500 Bron France tel: +33 (0)4 72 91 34 77 fax: +33 (0)4 72 91 34 61 portable: +33 (0)6 84 10 64 10 http://www.pizzerialesgemeaux.com/u846/ ______________________________________________ [email protected] 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.
