Rainer M Krug wrote: > > I have (8 measures * 96 groups) = 768 datasets for which I did linear > > regressions using lm(). > > > > Now I want to compare the slopes for each of the 8 measures in each of > > the 96 groups. As I understand , I can not use > >> anova(lm1, ..., lm8) > > as the lm1 ... lm8 are based on different datasets. > >
Instead of doing this in two steps, you would better use lme in package nlme to test the hypothesis in one run. I don't understand the details of you design, but is looks like the oxboys example in Pinheiro/Bates (the book of nlme) could give you a first starter. Dieter ______________________________________________ R-help@stat.math.ethz.ch 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.
