Try multcompView Hadley
On Sat, Jun 12, 2010 at 8:42 AM, Tal Galili <tal.gal...@gmail.com> wrote: > Hello dear R-help mailing list, > > A friend of mine teaches a regression and experimental design course and > asked me the following question. > > She is trying to find a way to display the "homogeneous groups" (after > performing tukey test on an aov object). > > here's an example for what she means by "homogeneous groups": > She did one way anova and got these results for tukey test: >> TukeyHSD(hci_anova) > Tukey multiple comparisons of means > 95% family-wise confidence level > Fit: aov(formula = time ~ interface, data = hci) > $interface > diff lwr upr p adj > B-A -23.75 -73.732836 26.23284 0.4165355 > C-A 31.25 -18.732836 81.23284 0.2415169 > C-B 55.00 5.017164 104.98284 0.0323006 > > now, she says, since she can see that the only significant difference is > between C and B treatments, then B and A are on the same group (no > significant difference), C and A are on the same group, but B anc C are not > in the same group. so we should have two groups: > A and B > A and C > > Apparently SPSS output gives the homogeneous subsets. > > > Do you know of a way in R to do that? > Also, since I am unfamiliar with this presentation, do you believe it is > useful/has value? > > > Thanks, > Tal > > > > ----------------Contact > Details:------------------------------------------------------- > Contact me: tal.gal...@gmail.com | 972-52-7275845 > Read me: www.talgalili.com (Hebrew) | www.biostatistics.co.il (Hebrew) | > www.r-statistics.com (English) > ---------------------------------------------------------------------------------------------- > > [[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. > -- Assistant Professor / Dobelman Family Junior Chair Department of Statistics / Rice University http://had.co.nz/ ______________________________________________ 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.
