Hi Justin, On Wed, Oct 5, 2011 at 3:32 PM, justin jarvis <littledude.jar...@gmail.com> wrote: > Hi all, > I am running regressions with many covariates, most of which remain the same > each time (control variables). Instead of writing 30 demographic variables > every regression, is there a way I could call them all at once using a > variable called, perhaps "demog"?
I would create a base model with just the covariates, and then use update() to add other variables. Best, Ista > > I have tried: >> demog <- list(age1, age2, age3) but I get an error when I try to call a > list in a regression. > > I also tried: >> demog <- cbind(age1, age2, age3) which allows me to run a regression, but > this is not practical because when I subset the original data set and run a > regression, this new matrix demog doesn't get subsetted as well, so the > variables are of differing length. > > I'm thinking there is an easy way to do this. Thanks for any help > guys/gals. > > Justin > PhD student, > University of California, Irvine > > [[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. > -- Ista Zahn Graduate student University of Rochester Department of Clinical and Social Psychology http://yourpsyche.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.
