Seems to work for me: > x <- data.frame(old1 = sample(c(1,2,8), 10, TRUE), old2 = 1:10) > x$new <- ifelse(x$old1 == 8, 1, x$old2) > x old1 old2 new 1 1 1 1 2 2 2 2 3 2 3 3 4 8 4 1 5 1 5 5 6 8 6 1 7 8 7 1 8 2 8 8 9 2 9 9 10 1 10 10
On Tue, Jul 10, 2012 at 8:26 PM, Jeff <r...@jp.pair.com> wrote: > > I'm sure this is easy, but I'm new to R and can't find any example of the > following. > > Here's what I'm trying to do in pseudo-code. > > data$newvar <- ifelse(data$oldvar1 == 8, 1,data$oldvar2) > > In other words, if the existing variable equals 8, then the new variable > should equal 1, otherwise the new variable should equal the value of another > existing variable. > > I've tried to follow the examples given on the web and in the R manuals, and > each time I get errors or unexpected values. > > Thanks > > Jeff > > ______________________________________________ > 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. -- Jim Holtman Data Munger Guru What is the problem that you are trying to solve? Tell me what you want to do, not how you want to do it. ______________________________________________ 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.
