The internet address to complement this is: http://wiki.r-project.org/rwiki/doku.php?id=guides:lmer-tests
sorry for the double posting! > -----Original Message----- > From: Gygax Lorenz ART > Sent: Tuesday, January 16, 2007 7:32 AM > To: [email protected] > Subject: RE: [R] Within-subject factors in lme > > > > Thanks for your suggestion. I guess the model you are fitting here > > has only a single random effect term, namely subject. If the effect > > of A depends on S, one needs to include an additional random effects > > term for the S:A interaction. > > It is not quite clear what you are after, but the 'if' sounds > as you would like to include interactions between your fixed > and random effects? This is done in the following way: > > lme (y ~ A + B, random= ~ A | S ) > or > lme (y ~ A + B, random= ~ B | S ) > or > lme (y ~ A + B, random= ~ A + B | S ) > > with redard to discussions on degrees of freedom (and thus > testing in mixed-effects models) you may also want to refer to: > > I hope this helps. > Regards, Lorenz Gygax > - > Swiss Federal Veterinary Office > Centre for proper housing of ruminants and pigs > Agroscope Reckenholz-Tänikon Research Station ART > ______________________________________________ [email protected] 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.
