Yes. Contrasts, by definition, represents between-group differences, so cannot yield individual group levels. The closest you get is that the _intercept_ is the level of the base group in treatment contrasts, and relevel() will allow you to change the base level.
-pd > On 10 Mar 2020, at 04:06 , Berwin A Turlach <berwin.turl...@gmail.com> wrote: > > G'day John, > > On Tue, 10 Mar 2020 01:42:46 +0000 > "Sorkin, John" <jsor...@som.umaryland.edu> wrote: > >> I am running a Poisson regression with a single outcome variable, >> HGE, and a single independent variable, a factor, Group which can be >> one of two values, Group1, or Group2. I am trying to define contrasts >> that will give me the values of my outcome variable (HGE) when >> group=Group1 and when group=Group2. > > Not sure what you mean, but I am suspecting you are after this output: > > R> fit0 <- glm(HGE ~ Group - 1,family=poisson,data=dataForR,offset=logFU) > R> summary(fit0) > > Cheers, > > Berwin > > ______________________________________________ > 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. -- Peter Dalgaard, Professor, Center for Statistics, Copenhagen Business School Solbjerg Plads 3, 2000 Frederiksberg, Denmark Phone: (+45)38153501 Office: A 4.23 Email: pd....@cbs.dk Priv: pda...@gmail.com ______________________________________________ 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.
