Hello On Mon, 16 Aug 2010 11:17:41 -0700 Dennis Fisher <fis...@plessthan.com> wrote: > Colleagues, > > R 2.11.1, OS X. Please forgive my ignorance of some issues related > to ANOVA. > This has already been discussed at length on this list. You might try searching the archives and using Rseek. There are two pointers that can get you started: http://myowelt.blogspot.com/2008/05/obtaining-same-anova-results-in-r-as-in.html (type iii ss, marginality) http://www.stats.ox.ac.uk/pub/MASS3/Exegeses.pdf (type iii ss, marginality)
Regards Liviu > I am trying to replicate some SAS analyses that use type 3 > sum of squares. The model that I am using is: lm(YVAR ~ DATA$SEQ + > DATA$SEQ %in% DATA$ID + DATA$PERIOD + FRAME$FORMULATION) The intent > is to use SEQ, PERIOD, FORMULATION and (SEQUENCE nested in ID) as > factors in the ANOVA. > > I can replicate the sum of squares for model / error / total. I have > two questions: 1. SAS reports type 3 sum of squares for each of the > factors. How can I obtain these? > > 2. I am not sure that the coding of nesting in the formula > is correct: DATA$SEQ %in% DATA$ID > Any advice on this would be appreciated. > > Dennis > > > Dennis Fisher MD > P < (The "P Less Than" Company) > Phone: 1-866-PLessThan (1-866-753-7784) > Fax: 1-866-PLessThan (1-866-753-7784) > www.PLessThan.com > > ______________________________________________ > R-help@r-project.org 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. ______________________________________________ R-help@r-project.org 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.
