[R-sig-phylo] correlation between discrete and continuous variables?
A question to the comparative method gurus: I have a phylogeny for a group of plants that repeatedly evolved annuality from perennial ancestors. For each tip in the tree I have characterized the climatic tolerances (e.g. temperature, precipitation, ...) . I would like to assess if there is a significant correlation between life cycle (discrete) and climate variables (continuous). I am not sure how to start with this and would appreciate your opinion! Regards, Christoph ___ R-sig-phylo mailing list R-sig-phylo@r-project.org https://stat.ethz.ch/mailman/listinfo/r-sig-phylo
Re: [R-sig-phylo] correlation between discrete and continuous variables?
Hi Christoph, There was some discussion following a similar question a year ago: The question: https://stat.ethz.ch/pipermail/r-sig-phylo/attachments/20080402/2e2b995e/attachment.pl The threads: https://stat.ethz.ch/pipermail/r-sig-phylo/2008-April/thread.html#35 I'll be interested to hear what approach you take, so let us (or me anyway) know. Stacey Quoting Christoph Heibl christoph.he...@gmx.net: A question to the comparative method gurus: I have a phylogeny for a group of plants that repeatedly evolved annuality from perennial ancestors. For each tip in the tree I have characterized the climatic tolerances (e.g. temperature, precipitation, ...) . I would like to assess if there is a significant correlation between life cycle (discrete) and climate variables (continuous). I am not sure how to start with this and would appreciate your opinion! Regards, Christoph ___ R-sig-phylo mailing list R-sig-phylo@r-project.org https://stat.ethz.ch/mailman/listinfo/r-sig-phylo ___ R-sig-phylo mailing list R-sig-phylo@r-project.org https://stat.ethz.ch/mailman/listinfo/r-sig-phylo
Re: [R-sig-phylo] correlation between discrete and continuous variables?
Hi Christoph, Stacey, This might be a problem for which a logistic regression (http://en.wikipedia.org/wiki/Logistic_regression) would be appropriate. If so, I encourage you to check out the following article, which I enjoyed: Ives, A. R., and T. Garland Jr. 2009. Phylogenetic logistic regression for binary dependent variables. Systematic Biology (Advance Access). URL: http://sysbio.oxfordjournals.org/cgi/content/abstract/syp074v1. Others on this list-serve might also be well suited to comment on this paper method. Sincerely, Liam Liam J. Revell NESCent, Duke University web: http://anolis.oeb.harvard.edu/~liam/ NEW email: lrev...@nescent.org sd...@duke.edu wrote: Hi Christoph, There was some discussion following a similar question a year ago: The question: https://stat.ethz.ch/pipermail/r-sig-phylo/attachments/20080402/2e2b995e/attachment.pl The threads: https://stat.ethz.ch/pipermail/r-sig-phylo/2008-April/thread.html#35 I'll be interested to hear what approach you take, so let us (or me anyway) know. Stacey Quoting Christoph Heibl christoph.he...@gmx.net: A question to the comparative method gurus: I have a phylogeny for a group of plants that repeatedly evolved annuality from perennial ancestors. For each tip in the tree I have characterized the climatic tolerances (e.g. temperature, precipitation, ...) . I would like to assess if there is a significant correlation between life cycle (discrete) and climate variables (continuous). I am not sure how to start with this and would appreciate your opinion! Regards, Christoph ___ R-sig-phylo mailing list R-sig-phylo@r-project.org https://stat.ethz.ch/mailman/listinfo/r-sig-phylo ___ R-sig-phylo mailing list R-sig-phylo@r-project.org https://stat.ethz.ch/mailman/listinfo/r-sig-phylo ___ R-sig-phylo mailing list R-sig-phylo@r-project.org https://stat.ethz.ch/mailman/listinfo/r-sig-phylo
