Thank you Marguerite. Looking at OUwie and OUCH/SLOUCH, i see that alpha is estimated along the other parameters, whereas in Hansen 1997 and other papers it is suggested that this would lead to very large standard errors. Is that problem resolved in these functions?
Best, Sandra. 2013/10/26 Marguerite Butler <mbutler...@gmail.com> > Dear Sandra, > > You might also want to look at the papers that go along with slouch, ouch, > and ouwie. Here are some pdfs, along with some tutorials. > > On my Rcompstart, the ouch stuff starts around page 165 > > Let me know if you need help with ouch. > > Marguerite > > > > > > > > > > > On Oct 24, 2013, at 7:03 AM, sandra goutte <gou...@mnhn.fr> wrote: > > Dear list, > > My aim is to compare the fit of models for which *theta* is allowed to > change at different nodes (different combinations of 1 ,2 or 3 nodes). I > don't really understand the calculation of the deviance, but if i'm not > mistaken the difference between the deviances of 2 models follows a > *chi*square distribution with the difference of parameters in the > models as > degree of freedom. Now, how to compare two models with the same number of > optimum changes but at different nodes? > > I am having a hard time understanding the details of the function with > regards to Hansen's (1997) paper. What is the relationship between the > deviance and the RSS from Hansen (1997)? Is it possible to calculate the > RSS from the output of compar.ou ? > > I would appreciate any advice or insight on the subject! > Sandra. > > -- > PhD Student > Muséum National d'Histoire Naturelle > Département Systématique et Évolution > USM 601 / UMR 7205 Origine, Structure et Évolution de la Biodiversité > Reptiles & Amphibiens - Case Postale 30 > 25 rue Cuvier > F-75005 Paris > > Tel : +33 (0) 1 40 79 34 90 > Mobile: +33 (0) 6 79 20 29 99 > > [[alternative HTML version deleted]] > > _______________________________________________ > R-sig-phylo mailing list - R-sig-phylo@r-project.org > https://stat.ethz.ch/mailman/listinfo/r-sig-phylo > Searchable archive at > http://www.mail-archive.com/r-sig-phylo@r-project.org/ > > > ____________________________________________ > Marguerite A. Butler > Associate Professor > > Department of Biology > University of Hawaii > 2538 McCarthy Mall, Edmondson Hall 216 > Honolulu HI 96822 > > Office: 808-956-4713 > Dept: 808-956-8617 > Lab: 808-956-5867 > FAX: 808-956-9812 > http://www.hawaii.edu/zoology/faculty/butler.html > http://www2.hawaii.edu/~mbutler > http://www.hawaii.edu/zoology/ > > > > > > > > > > -- PhD Student Muséum National d'Histoire Naturelle Département Systématique et Évolution USM 601 / UMR 7205 Origine, Structure et Évolution de la Biodiversité Reptiles & Amphibiens - Case Postale 30 25 rue Cuvier F-75005 Paris Tel : +33 (0) 1 40 79 34 90 Mobile: +33 (0) 6 79 20 29 99 [[alternative HTML version deleted]]
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