Hi: You'd have to provide a dput of "model2" and "Country" for anyone to give a definitive answer but my guess is that you have an orthogonal X matrix which is causing you to fit the model perfectly which causes the model residuals to be zero.
Also, you didn't explain what you're doing but modelling residuals by using purely factors doesn't sound like something one would want to do ? I could be mistaken since I don't know the context but you should explain what exactly what your goal is and your reasoning for doing what you're doing. On Thu, Oct 1, 2015 at 3:15 PM, Johanna von Bahr <johanna.vonb...@gmail.com> wrote: > I’m trying to estimate a model regressing the residuals on the country > dummies as follows; > model.resC <- lm(model2$res ~ as.factor(Country)) > summary(model.resC) > > As I call the model I get the following results regarding the residuals: > > "ALL 90 residuals are 0: no residual degrees of freedom!" > > What has gone wrong? > ______________________________________________ > 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. [[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.
