Inline. Cheers, Bert
Bert Gunter Genentech Nonclinical Biostatistics (650) 467-7374 "Data is not information. Information is not knowledge. And knowledge is certainly not wisdom." Clifford Stoll On Thu, Feb 26, 2015 at 8:02 AM, Mikael Olai Milhøj <mikaelmil...@gmail.com> wrote: > Hi all > > I have been searching on the web in vain. I want to include a dummy > variable in my ARIMA model. Let's say that I want to make an AR(1) model > for X including a dummy variable which should be 1 for observation 4,5,6 > and zero otherwise (let's say that there is 50 observations in total). How > do I make that? You don't, really. 1. Go through an R tutorial so that you understand the concept of factors and how they are used in R modeling. 2. fact <- factor( (1:50) %in% (4:6)) Cheers, Bert > > This does the trick but seems inefficient: dummy<-c(rep(0,3), rep(1,3), > rep(0,44)) > > Thx in advance > > Best regards > /Mikael > > [[alternative HTML version deleted]] > > ______________________________________________ > R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see > 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. ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see 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.
