Hi all, I find an introduction for program lme() for fitting mixed effects models. I do not have the book wirtten by Pinheiro and Bates, and a tutorial would be very useful. In particular, I have some difficulties to understand how specifications for random effects and variance structures could be specified. somebody knows an introduction for that ? Thanks, Olivier
r-help-bounces at stat.math.ethz.ch wrote on 23/04/2004 12:12:31:> Hi all, > > I find an introduction for program lme() for fitting mixed effectsmodels.> I do not have the book wirtten by Pinheiro and Bates, and a tutorial > would be very useful. > In particular, I have some difficulties to understand how specifications > for random effects and variance structures > could be specified. > > somebody knows an introduction for that ?http://socserv.mcmaster.ca/jfox/Books/Companion/appendix-mixed-models.pdf This is part of the web appendix to "An R and S-PLUS Companion to Applied Regression" by John Fox, Sage Publications, 2002. HTH, Tobias
> In particular, I have some difficulties to understand howspecifications> for random effects and variance structures > could be specified. >I had similar problems myself... until a reply from Douglas Bates to one of my posts, wich clarified me how to specify the random effects. You should be able to find it at: http://finzi.psych.upenn.edu/R/Rhelp02/archive/14199.html (or search the R site using the keywords Calboli and Crawley, should be the first hit). I am not an expert, but you are welcome to contact me off list for any further clarifications I can offer (not many, do not hold your breath). regards, Federico Calboli -- ================================ Federico C. F. Calboli Dipartimento di Biologia Via Selmi 3 40126 Bologna Italy tel (+39) 051 209 4187 fax (+39) 051 209 4286 f.calboli at ucl.ac.uk