WPhantom <[EMAIL PROTECTED]> writes: > Thanks Brian for the reference. > I just discover that it is available in our > library so I going to take it & read it soon. > Actually, I don't even know the difference > between a multistratum vs a single-stratum AOV. A > quick search on google returned me the R materials so that I imagine > that these concepts are quite specific to R.
You have to be careful not to confuse Google's view of the world with Reality... The concept of error strata is much older than R, and existed for instance in Genstat, anno 1977 or so. However, Genstat seems to have left little impression on the Internet. > I will read the book first before asking for more informations. The executive summary is that the concept of error strata relies substantially on having a balanced design (at least for the random effects), so that the analysis can be decomposed into analyses of means, contrasts, and contrasts of means. For unbalanced designs, you usually get meaningless analyses. > Thanks > > Sylvain Clément > > At 12:38 14/02/2006, you wrote: > >More to the point, you are confusing > >multistratum AOV with single-stratuam AOV. For > >a good tutorial, see MASS4 (bibliographic > >information in the R FAQ). For unbalanced data > >we suggest you use lme() instead. > > > >-- > >Brian D. Ripley, [EMAIL PROTECTED] > > ______________________________________________ > [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 > -- O__ ---- Peter Dalgaard Øster Farimagsgade 5, Entr.B c/ /'_ --- Dept. of Biostatistics PO Box 2099, 1014 Cph. K (*) \(*) -- University of Copenhagen Denmark Ph: (+45) 35327918 ~~~~~~~~~~ - ([EMAIL PROTECTED]) FAX: (+45) 35327907 ______________________________________________ [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
