Hi Liam and others,
Thanks for your helpful replies!
I took a glimpse on the article of Ives and Garland (2009) and
phylogenetic logistic regression really seems the way to go for me.
Unfortunately, I do not have access to matlab and, I guess, the code
has not been implemented in R so far. Maybe I will have a try myself,
although it might well exceed my skills.
Another question concerns statistical power. The clade I am working
with has only about 18 species, 5 of which are annuals. I am afraid
that this is little data for including say 4-6 independent variables
in a phylogentic logistic regression. Can someone comment on that?
Regards,
Christoph
On Dec 1, 2009, at 4:35 PM, Liam J. Revell wrote:
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
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