I do not think anyone has answered this. > I'm trying to run a simple one-way ANCOVA with the lmer > function in R package lme4, but have encountered some > conceptual problem. The data file MyData.txt is like this: > > Group Subj Cov Resp > A 1 3.90 4.05 > A 2 4.05 4.25 > A 3 4.25 3.60 > A 4 3.60 4.20 > A 5 4.20 4.05 > A 6 4.05 3.85 > B 7 3.85 4.15 > B 8 4.15 4.60 > B 9 4.60 4.15 > B 10 4.15 4.40 > B 11 4.40 3.35 > B 12 3.35 3.80 > B 13 3.80 3.90 > > Since I would like to treat subject (Subj) as a random > factor, my one- way ANCOVA (with covariate, Cov) is:
This is a conceptual problem, indeed. To be able to estimate a subject effect, you need to have repeated measurements (several lines) per observed subject ... Cheers, Lorenz ______________________________________________ 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.
