iam J. Revell"
Subject: Re: [R-sig-phylo] PGLS, polytomies, degrees of freedom and
multiple specimens
To: Popko Wiersma
Cc: r-sig-phylo@r-project.org
>Hi Popko,
>
>My sense is that if the polytomy is hard, it is never necessary to
>subtract a deg
Hi Popko,
Liam is correct. Answering the second question, I presume your
polytomies involve multiple specimens (individuals) of the same species,
is that right? If so, you do not need to correct for soft politomies;
instead, you may partition the variation within/between species as
discussed i
Hi Popko,
My sense is that if the polytomy is hard, it is never necessary to
subtract a degree of freedom. If the polytomy is "firm" (sensu Purvis &
Garland 1993) - in that the true tree is fully bifurcating but we cannot
resolve a multifurcating node due primarily to rapid divergence of the
Dear all,
Can somebody tell whether one should subtract degrees of freedom when
applying PGLS with a phylogeny containing soft polytomies? And does it make
a difference if polytomies originate from data from multiple specimens of
species?
cheers, Popko Wiersma
- I reposted this message beca
