I'm new to the list and I've been playing about with R for some months now, mostly using the power analysis routines including the "pwr" package. I'm currently looking at a project which will require a repeated-measures MANCOVA. I've been reviewing the files available at CRAN, including http://cran.r-project.org/doc/contrib/Lemon-kickstart/kr_repms.html and http://tolstoy.newcastle.edu.au/R/help/03b/7663.html which describe repeated-measures ANOVA Is making this a repeated-measures MANCOVA as simple as adding a covariate to the fixed model and then making the Y and covariate variables matrices? If not, how do I do it? Can I do it? And if I can do it, can I also do a power analysis? (OK, I'm a greedy little newbie...) Thanks in advance. -- I can answer any question. "I don't know" is an answer. "I don't know yet" is a better answer.