Thank you Jorge and Barry for your input. I've fiddled around a bit and as a result, am even more confused. If I start R console via Notepad++ (I use Npp2R) and execute the model1, it goes through just fine. Here is the sessionInfo() for this "working" session:
> sessionInfo() R version 2.9.2 (2009-08-24) i386-pc-mingw32 locale: LC_COLLATE=Slovenian_Slovenia.1250;LC_CTYPE=Slovenian_Slovenia.1250;LC_MONETARY=Slovenian_Slovenia.1250;LC_NUMERIC=C;LC_TIME=Slovenian_Slovenia.1250 attached base packages: [1] stats graphics grDevices utils datasets methods base loaded via a namespace (and not attached): [1] tools_2.9.2 And if I run R "normally", via an icon from the desktop (Rgui.exe) it gives the aforementioned error. Here is the sessionInfo() for "non-working" session. Is it possible that grid, reshape, plyr, ggplot2 and proto could be causing this? If so, how can I prevent them from loading automatically or unloading from a live session? > sessionInfo() R version 2.9.2 (2009-08-24) i386-pc-mingw32 locale: LC_COLLATE=Slovenian_Slovenia.1250;LC_CTYPE=Slovenian_Slovenia.1250;LC_MONETARY=Slovenian_Slovenia.1250;LC_NUMERIC=C;LC_TIME=Slovenian_Slovenia.1250 attached base packages: [1] stats graphics grDevices utils datasets grid methods [8] base other attached packages: [1] reshape_0.8.3 plyr_0.1.9 proto_0.3-8 loaded via a namespace (and not attached): [1] ggplot2_0.8.3 Cheers, Roman On Sun, Oct 11, 2009 at 6:32 PM, Jorge Ivan Velez <jorgeivanve...@gmail.com>wrote: > Hi Romain, > It works for me: > > model1 <- glm(as.vector(x) ~dept*sex*admit,poisson) > model1 > > Call: glm(formula = as.vector(x) ~ dept * sex * admit, family = poisson) > > Coefficients: > (Intercept) dept2 dept3 dept4 > dept5 > 6.23832 -0.37186 -1.45083 -1.31107 > -2.26803 > dept6 sex2 admit2 dept2:sex2 > dept3:sex2 > > [trimmed] > > Here is my sessionInfo(): > > R version 2.9.2 RC (2009-08-23 r49375) > i386-pc-mingw32 > > locale: > LC_COLLATE=English_United States.1252;LC_CTYPE=English_United > States.1252;LC_MONETARY=English_United > States.1252;LC_NUMERIC=C;LC_TIME=English_United States.1252 > > attached base packages: > [1] stats graphics grDevices utils datasets methods base > > other attached packages: > [1] lattice_0.17-25 combinat_0.0-6 > > loaded via a namespace (and not attached): > [1] grid_2.9.0 tools_2.9.0 > > > HTH, > Jorge > > > On Sun, Oct 11, 2009 at 11:54 AM, romunov <> wrote: > >> Dear List, >> >> I'm having problem with an exercise from The R book (M.J. Crawley) on page >> 567. >> Here is the entire code upto the point where I get an error. >> >> data(UCBAdmissions) >> x <- aperm(UCBAdmissions, c(2, 1, 3)) >> names(dimnames(x)) <- c("Sex", "Admit?", "Department") >> ftable(x) >> fourfoldplot(x, margin = 2) >> dept<-gl(6,4) >> sex<-gl(2,1,24) >> admit<-gl(2,2,24) >> model1<-glm(as.vector(x) ~dept*sex*admit,poisson) >> >> This last line returns: >> >> Error in family$family : $ operator is invalid for atomic vectors >> >> I've searched older posts but found nothing that would help resolve my >> problem. Has anyone encountered anything similar and/or knows a fix? >> >> Cheers, >> Roman >> >> [[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. >> > > [[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.