> -----Original Message----- > From: r-help-boun...@r-project.org > [mailto:r-help-boun...@r-project.org] On Behalf Of kayj > Sent: Tuesday, February 10, 2009 1:44 PM > To: r-help@r-project.org > Subject: [R] ifelse() > > > I have a problem with ifelse(), I do not understand how it works. > > > X<-c(2,2,1,1,0,0) > > str(X) > num [1:6] 2 2 1 1 0 0 > > Y<-ifelse(X>0,1,0) > > Y > [1] 1 1 1 1 0 0 > > > > Can some one explain what is going on, I do not understand > what ifelse is > doing in this case. Can someone explain the output Y. > > Thanks >
ifelse goes through your vector X, 1 element at a time, and if the element is greater than zero it returns a 1, otherwise, 0. The resulting vector of 1s and 0s is assigned to Y Hope this is helpful, Dan Daniel J. Nordlund Washington State Department of Social and Health Services Planning, Performance, and Accountability Research and Data Analysis Division Olympia, WA 98504-5204 ______________________________________________ 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.
