----- Original Message ---- From: Robert Baer <rb...@atsu.edu> To: Stephen Liu <sati...@yahoo.com>; r-help@r-project.org Sent: Tue, August 17, 2010 12:35:07 AM Subject: Re: [R] Learning ANOVA
>>> modelfn(count ~ spray, data=test01) >> Error: could not find function "modelfn" >> >> What will be +var3 ? >I think the general advice applied to your specific situation was meant to >suggest using the construct: >InsectSprays.aov <- aov(count ~ spray, data=InsectSprays) >rather than: >InsectSprays.aov <- aov(InsectSprays$count ~ InsectSprays$spray) Hi Robert, Thanks for your advice. Can I add covariates selectively. e.g. There are 5 covariate, say aaa, bbb, ccc, ddd, eee I only want to use 4 of them, say aaa, bbb, ddd, eee . Then the construction will be; >test.aov <- aov(aaa, bbb, ddd, eee, data=file_name) ?? Is there a limit of covariates to add? TIA B.R. Stephen L ----- Original Message ----- From: "Stephen Liu" <sati...@yahoo.com> To: <r-help@r-project.org> Sent: Monday, August 16, 2010 11:01 AM Subject: Re: [R] Learning ANOVA > ----- Original Message ---- > > From: Erik Iverson <er...@ccbr.umn.edu> > To: Stephen Liu <sati...@yahoo.com> > Cc: r-help@r-project.org > Sent: Mon, August 16, 2010 11:41:34 PM > Subject: Re: [R] Learning ANOVA > >>> modelfn(count ~ spray, data=test01) >> Error: could not find function "modelfn" >> >> What will be +var3 ? >> > >> This is just a generic example. modelfn can be any modeling >> function, e.g., lm, glm, gam, etc. > > Hi Erik, > > Is it aov a modeling function? > > If YES whether the command is; > >> InsectSprays.aov <- aov(count ~ spray, data=test01) > ? > > I can't resolve what will be "+var3"? > > > B.R. > Stephen L > > > > ______________________________________________ > 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. > ______________________________________________ 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.