This makes sense to me too… thanks for your thoughts! Jake > On Jan 26, 2017, at 7:55 PM, Donald Miles <urosau...@gmail.com> wrote: > > I agree with Ted. The comparison should be how the transformation affects the > distribution of the response variable. As Ted mentioned, you should examine > the behavior of the residuals to determine whether they conform to the > assumptions of the statistical analysis after transformation. > > Donald Miles > > On Thu, Jan 26, 2017 at 7:49 PM, Theodore Garland <theodore.garl...@ucr.edu > <mailto:theodore.garl...@ucr.edu>> wrote: > I don't think you can compare models like this for different transforms of > the dependent variable. The likelihood, etc., values are not comparable, > as your results suggest. But I am sure someone will correct me if I am > wrong! > > Assuming this is some sort of regression model (i.e., you have one or more > independent variables), then you CAN look at residuals to see if they are > better/worse behaved (e.g., approximately normal, no nasty outliers, > homoscedasticity). > > Cheers, > Ted > > > On Thu, Jan 26, 2017 at 2:25 PM, Jacob Berv <jakeberv.r.sig.ph...@gmail.com > <mailto:jakeberv.r.sig.ph...@gmail.com>> > wrote: > > > Dear R-sig-phylo, > > > > When analyzing comparative data in a PCM framework, is it be appropriate > > to use an AIC score to advocate for log transforming input data? ie > > model(data) vs model(log(data)) > > > > I’m running a few OUwie models and it’s not entirely clear from the > > biology whether or not the ‘standard’ log transformation makes sense. In my > > case, the model(log(data)) results have much lower AIC values relative to > > the model(data) results. > > > > Cheers, > > Jake Berv > > _______________________________________________ > > R-sig-phylo mailing list - R-sig-phylo@r-project.org > > <mailto:R-sig-phylo@r-project.org> > > https://stat.ethz.ch/mailman/listinfo/r-sig-phylo > > <https://stat.ethz.ch/mailman/listinfo/r-sig-phylo> > > Searchable archive at http://www.mail-archive.com/r- > > <http://www.mail-archive.com/r-> > > sig-ph...@r-project.org/ <http://sig-ph...@r-project.org/> > > [[alternative HTML version deleted]] > > _______________________________________________ > R-sig-phylo mailing list - R-sig-phylo@r-project.org > <mailto:R-sig-phylo@r-project.org> > https://stat.ethz.ch/mailman/listinfo/r-sig-phylo > <https://stat.ethz.ch/mailman/listinfo/r-sig-phylo> > Searchable archive at http://www.mail-archive.com/r-sig-phylo@r-project.org/ > <http://www.mail-archive.com/r-sig-phylo@r-project.org/>
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