Hello Gavin, You could have a look at the method for evolutionary contingency, which works only for binary traits (meaning you’d have to transform your continuous trait into a binary one). See Pagel and Meade 2006 (Bayesian Analysis of Correlated Evolution of Discrete Characters by Reversible-Jump Markov Chain Monte Carlo in Am Nat) for details on the method. Note that it will provide information on whether evolutionary transitions in trait state for one of the traits is contingent on the state of the second one. You can infer the probable history of transitions from the results. However, you should be careful as the method is sensitive to trait-state distribution.
Cheers Alejandro _______________________________________________ Dr Alejandro Gonzalez Voyer Laboratorio de Conducta Animal Instituto de Ecología Circuito Exterior S/N Ciudad Universitaria Universidad Nacional Autónoma de México México, D.F. 04510 México Tel: +52 55 5622 9044 E-mail: alejandro.gonza...@iecologia.unam.mx Web: www.alejandrogonzalezvoyer.com > El 04/04/2016, a las 13:37, Gavin McLean Leighton <gm...@cornell.edu> > escribió: > > Hi all, > > > I have 500 trees of 80 species downloaded from birdtree.org and am primarily > interested in two traits. I have used PGLS to determine the traits are > related but would ideally like to test if there is an order to trait > evolution. To complicate matters one trait (Trait A) is continuous while the > second (Trait B) is presence/absence. I was hoping someone could direct me to > methods (assuming they exist) that would allow me to determine the estimated > value of Trait A before a gain of Trait B evolves in a lineage. > > > Thank you, > > Gavin > > > Gavin Leighton > NSF Postdoctoral Fellow > Cornell University > Cornell Laboratory of Ornithology > 159 Sapsucker Woods Road > Ithaca, NY > http://www.gavinmleighton.com/ > > > [[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/ [[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/
