What you are doing wrong: 1. You haven't read the posting guide, and so have not posted with sufficient clarity for people to help (at least I can't -- what's your data look like?);
2. You've posted to the wrong list: mixed models posts are better answered on the r-sig-mixed-models list. 3. I am not even sure that this is an R question, and not just a statistical question. But I'll leave that for the experts on the mixed models list. -- Bert On Sun, Dec 16, 2012 at 8:11 PM, Stephen Sammut <ssam...@gmail.com> wrote: > I am new to R and have been doing my utmost to learn it in order to teach > my > students how to use it as an alternative to programs you have to purchase  > and I am very grateful for the program and what it can doŠ.but I am having > a > slight problem as I also am not very much into programming  though willing > to learn. > > I have been trying to apply a mixed model ANOVA to some data I have. In > short  one repeated measure (behavior being observed with 8 levels), one > independent measure (Age with 2 levels - classified as <21 or >=21) and > then > the dependent variable is the score that the subjects obtained for the > specific behavior (Frequency). > > I have been trying to use the aov model set up in the following way based > on > what I have searched online: > aov(Frequency~Behavior*Age+Error(Subject/Behavior)+Age, dataframe). My data > is organized such that I have the data in the long format  Subject, Age, > Behavior, Frequency. > > All this gives me the following error: > > Warning message: > In aov(Frequency~Behavior*Age+Error(Subject/Behavior)+Age, : > Error() model is singular > > If you would kindly excuse my ignorance, would someone please guide me as > to > what I am doing wrong. > > Thank you in advance. > Stephen > > > > [[alternative HTML version deleted]] > > > ______________________________________________ > 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. > > -- Bert Gunter Genentech Nonclinical Biostatistics Internal Contact Info: Phone: 467-7374 Website: http://pharmadevelopment.roche.com/index/pdb/pdb-functional-groups/pdb-biostatistics/pdb-ncb-home.htm [[alternative HTML version deleted]]
______________________________________________ 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.
