A guess (treat accordingly): Different BLAS versions are in use on the two different machines/versions. In one, near singularities are handled, and in the other they are not, percolating up to warnings at the R level.
You can check this by seeing whether the estimated fit is the same on the 2 machines. If so, ignore the above. -- Bert Bert Gunter "The trouble with having an open mind is that people keep coming along and sticking things into it." -- Opus (aka Berkeley Breathed in his "Bloom County" comic strip ) On Tue, Dec 5, 2017 at 12:17 PM, Cade, Brian <ca...@usgs.gov> wrote: > I am helping a student with some logistic regression analyses and we are > getting some strange inconsistencies regarding a warning about factor > levels being dropped when running predict.glm(, newdata = ournewdata) on > the logistic regression model object. We have checked multiple times that > the factor levels have been defined similarly on both data sets (one used > to estimate model and the newdata) and that values occur for all factor > levels in both data sets. When I run these commands on my version of R > (3.2.5) on a Windows 7 OS I do not get the warnings. When the student runs > them on her version of R (not sure what number hers is) on her Mac, she > gets these warnings constantly. I've checked some records manually by > doing the algebra and the predict.glm() function is working correctly > incorporating the factor levels on my machine. Any thoughts??? > > Brian > > Brian S. Cade, PhD > > U. S. Geological Survey > Fort Collins Science Center > 2150 Centre Ave., Bldg. C > Fort Collins, CO 80526-8818 > > email: ca...@usgs.gov <brian_c...@usgs.gov> > tel: 970 226-9326 > > [[alternative HTML version deleted]] > > ______________________________________________ > 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. > [[alternative HTML version deleted]] ______________________________________________ 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.
