On Mar 17, 2011; 11:43am Baugh wrote: >> Question: can I simply substitute a dummy var (e.g. populated by zeros) >> for "ID" to run the model >> without the random factor? when I try this R returns values that seem >> reasonable, but I want to be sure >> this is appropriate.
If you can fit the model using lme (and it looks like you easily can) then another check would be: ## Compare models with and without random effects fm <- lm(Reaction ~ Days, sleepstudy) fm1 <- lme(Reaction ~ Days, random= ~1|Subject, sleepstudy) anova(fm1, fm) ## lme-fitted model must come first Regards, Mark. -- View this message in context: http://r.789695.n4.nabble.com/lmm-WITHOUT-random-factor-lme4-tp3384054p3384072.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ 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.
