Hi,
Thanks for the Allman Rhodes paper, it is very nice. For me at least
it confirms my suspicions, but made me realise that claims of
asymmetric transition rates are only suspicious if you are unprepared
to make some (strong?) assumptions. If anyone disagrees with what I
have written
Hi folks-
I still think there is a difference between (i) parameter identifiability,
which may or may not be a problem here, and (ii) strong support for the wrong
model, which clearly appears to be occurring here (e.g., Type I error rates
0.75). I don't think non-identifiability of a
Hi all,
I brought up the non-identifiability of the rich forms of the covarion model
only because that is the source for my intuition that it will be really hard to
distinguish the 1-binary-character threshold from the covarion. I agree with
Dan, that the non-identifiability is not causing
Hi,
I see the problem: the threshold model is symmetric but NOT in the
sense used in the ARD model. In the threshold model it is natural to
think about evolution of the probabilty of being in one state versus
the other. If the probability at the root was 0.2 and evolution was
very slow
Hello.
I'm new on phylogenetics and i find it hard understand how to do a
phylogenetic tree with more than one gene (sequence).
For example, i was reading A large-scale phylogeny of Amphibia
including over 2800 species, and a revised classification of extant
frogs, salamanders, and caecilians
Hi all,
I am testing a correlation between two explanatory variables and a response
variable using PGLS. All of the variables are continuous. My model is Log
female body size ~ Log egg size * Log clutch size. However, there is a
significant negative correlation between egg size and clutch
The issue of collinearity of independent variables is neither better nor worse
with PGLS as opposed to OLS. Statistical significance per se of a correlation
between X variables is not really the issue. How strong is the correlation?
Most sources suggest that it needs to be greater than
Thanks Dr. Garland,The correlation between egg size and clutch size is 0.3, and
the variance inflation factors for both egg size and clutch size are smaller
than 2. There shouldn't be a big problem of collinearity. Thanks for your
clarification.Best,Xu
From: theodore.garl...@ucr.edu
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