as.numeric(x1 == 1 | x2 == 1 | x3 == 1 | x4 == 1) On Wed, Jun 19, 2013 at 9:24 AM, Brian Perron <beper...@umich.edu> wrote:
> Greetings: > > I am looking for a way to avoid using the ifelse function for > constructing a new variable. More specifically, assume I have a set > of variables with scores ranging from 1 to 30. > > set.seed(12345) > x <- c(1:30) > x1 <- sample(x, 15, replace = TRUE) > x2 <- sample(x, 15, replace = TRUE) > x3 <- sample(x, 15, replace = TRUE) > x4 <- sample(x, 15, replace = TRUE) > > I want to construct a dichotomous variable that tests whether any of > the variables contains the value 1. > > newVar <-ifelse(x1 == 1 | x2 == 1 | x3 == 1 | x4 == 1, 1, 0) > > I want to avoid the ifelse function because I have a number of large > variable lists that will require new variables to be created. I'm > sure there is a simple way to do this, but I haven't had any luck with > my search! > > Thanks in advance. > > Brian > > ______________________________________________ > 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. > [[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.
