Please! "when I compute the anova R reports that the Estimated Effects are Unbalanced"
It does *not* say this. It says that they **may** be unbalanced. They are not. -- Bert Bert Gunter "The trouble with having an open mind is that people keep coming along and sticking things into it." -- Opus (aka Berkeley Breathed in his "Bloom County" comic strip ) On Mon, Aug 22, 2016 at 8:15 AM, Justin Thong <justinthon...@gmail.com> wrote: > Something does not make sense in R. It has to do with the question of > balance and unbalance. > > *A<-factor(c(1,1,1,1,1,1,2,2,2,2,2,2))* > *B<-factor(c(1,1,2,2,3,3,1,1,2,2,3,3))* > *y<-rnorm(12)* > *mod<-aov(y~A+B)* > > I was under the impression that the design is balanced ie order does not > effect the sums of squares. However, when I compute the anova R reports > that the Estimated Effects are Unbalanced. I thought that when all > combinations of levels of A and B have equal replications then the design > is called balanced. But, R tends to think that when not all levels of A and > levels of B have equal replication, then the "Estimated Effects are > unbalanced".... Is this the same as the design being unbalanced? Because > for the example below, where the error occured, the order does not matter > (which make me think that the design is balanced). > > > *Call:* > * aov(formula = y ~ A + B)* > > *Terms:* > * A B Residuals* > *Sum of Squares 0.872572 0.025604 16.805706* > *Deg. of Freedom 1 2 10* > > *Residual standard error: 1.296368* > *Estimated effects may be unbalanced* > -- > Yours sincerely, > Justin > > *I check my email at 9AM and 4PM everyday* > *If you have an EMERGENCY, contact me at +447938674419(UK) or > +60125056192(Malaysia)* > > [[alternative HTML version deleted]] > > ______________________________________________ > R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see > 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 -- To UNSUBSCRIBE and more, see 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.
