R is for dummies (like me, but I don't use dummy variables) or for the non-Dummies like all experts who help us all the time@@.. so dummy variables are not needed! :) QED...
On Sat, Apr 20, 2013 at 6:16 PM, Rolf Turner <rolf.tur...@xtra.co.nz> wrote: > On 21/04/13 10:56, Eva Prieto Castro wrote: > >> Hi, >> >> Why do you write that dummy variables are not needed in R?. I would like >> you explain it. >> > > As others have said --- do some self-study. But a brief answer is that in > any > "reasonable" modelling problem in which dummy variables might arise, R > creates > the dummy variables that it uses automagically , behind the scenes, from > the *factors* > whose levels correspond to the dummy variables. > > Summary: Learn about and understand *factors*; forget about dummy > variables. > > cheers, > > Rolf Turner > > > ______________________________**________________ > R-help@r-project.org mailing list > https://stat.ethz.ch/mailman/**listinfo/r-help<https://stat.ethz.ch/mailman/listinfo/r-help> > PLEASE do read the posting guide http://www.R-project.org/** > posting-guide.html <http://www.R-project.org/posting-guide.html> > and provide commented, minimal, self-contained, reproducible code. > [[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.
