Hi, Thanks for providing a reproducible example.
On Tue, Nov 20, 2012 at 2:08 PM, Virgile Capo-Chichi <vcapochi...@gmail.com> wrote: > Dear R users, > > As a new comer to R, I would like to create a new variable using if > statements but don't know how to do it. Basically, I have two variables > (EvHint and MinTex). I want to create a third variable called RiskTest. > > In SPSS, my syntax would look like > > Compute RiskTest=0. > if (EvHint=1 & MinTex=1) RiskTest=1. > > Question: How do I do this with R? > > My Data > > EvHint<-c(0, 0, 0, 1, 0, 1, 1, 0, 1, 1, 1, 1, 1, 0, 1, 0, 0, 1, 0, 0) > MinTex<-c(0, 0, 1, 1, 0, 1, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 1, 0) In this case, RiskTest <- EvHint * MinTex In the more general case, RiskTest <- ifelse(EvHint == 1 & MinTex == 1, 1, 0) Note that the test for equality is == and not = You should probably read the Intro to R that came with your installation and is available online. -- Sarah Goslee http://www.functionaldiversity.org ______________________________________________ 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.
