Yes, David is absolutely right - that's it! On Thu, Mar 4, 2010 at 12:21 PM, Dimitri Liakhovitski <ld7...@gmail.com> wrote: > Yes, I was indeed asking about stepwise procedures! > > On Thu, Mar 4, 2010 at 11:29 AM, David Winsemius <dwinsem...@comcast.net> > wrote: >> >> On Mar 4, 2010, at 10:47 AM, Dimitri Liakhovitski wrote: >> >>> I am not sure if this question has been asked before - but is there a >>> procedure in R (in lm or glm?) that is equivalent to ENTER and REMOVE >>> regression commands in SPSS? >>> Thanks a lot! >> >> I haven't used SPSS for 25 years (excluding a brief session where I talked >> an inexperienced SPSS user through creating a multi-way table of mortality >> ratios a couple of years ago) but my memory is that those operations drop or >> add terms to a model formula and produced voluminous paper output as a >> result. Looking at the "lm" function help page, I guessed that I might find >> more information at the anova.lm help page and sure enough, there at the >> bottom of the page was "drop1". My vague memory that there was a matching >> "add1" was rewarded with confirmation when I followed the "drop1" link. >> >> I generally just make another call to lm(). >> >> >>> >>> -- >>> Dimitri Liakhovitski >>> Ninah.com >>> dimitri.liakhovit...@ninah.com >>> >> -- >> >> David Winsemius, MD >> Heritage Laboratories >> West Hartford, CT >> >> > > > > -- > Dimitri Liakhovitski > Ninah.com > dimitri.liakhovit...@ninah.com >
-- Dimitri Liakhovitski Ninah.com dimitri.liakhovit...@ninah.com ______________________________________________ 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.
