Displaying 5 results from an estimated 5 matches for "speciation".
2002 May 28
1
passing model objects to anova()
Hi,
I'm fitting a glm to a dataset...
> objects()
[1] "pop.div.full" "speciation.data"
...and then performing model simplification to give a series of model
objects all of which have a common suffix.
> objects()
[1] "pop.div.full" "pop.div.gp.f.b.hm"
[3] "pop.div.gp.fb.hm" "pop.div.same.slopes&...
2019 Apr 05
0
new R packages for phylogenetic compartive methods
...ngine that mvSLOUCH uses. Given a phylogeny (phylo format), traits' (multivariate) measurements and a user provided model of the traits' evolution the package calculates the likelihood. The family of allowed models is rather general. The package can handle any model for which lineages after speciation do not interact and the density of the transition along a branch is:
i) Gaussian
ii) the mean at the end of the branch depends linearly on the trait value at the start of the branch
iii) the covariance matrix does not depend on the value at the start of the branch
The likelihood is calculated in li...
2019 Apr 05
0
new R packages for phylogenetic compartive methods
...ngine that mvSLOUCH uses. Given a phylogeny (phylo format), traits' (multivariate) measurements and a user provided model of the traits' evolution the package calculates the likelihood. The family of allowed models is rather general. The package can handle any model for which lineages after speciation do not interact and the density of the transition along a branch is:
i) Gaussian
ii) the mean at the end of the branch depends linearly on the trait value at the start of the branch
iii) the covariance matrix does not depend on the value at the start of the branch
The likelihood is calculated in li...
2018 Oct 22
0
With the right kind of eyes you can almost see the high-water mark—that place where the wave finally broke and rolled back.
...dentified by a sharp change in the diversity and
abundance of multicellular organisms
<http://vesedo.cf/lists/lt.php?id=YUgFAgZVU09RXVEdU1wDX1cNVg>
. It occurs when the rate of extinction
<http://vesedo.cf/lists/lt.php?id=YUgFAgZVXE9RXVEdU1wDX1cNVg>
increases with respect to the rate of speciation
<http://vesedo.cf/lists/lt.php?id=YUgFAgZVXU9RXVEdU1wDX1cNVg>
. Because most diversity and biomass
<http://vesedo.cf/lists/lt.php?id=YUgFAgZWVE9RXVEdU1wDX1cNVg>
on Earth is microbial
<http://vesedo.cf/lists/lt.php?id=YUgFAgZWVU9RXVEdU1wDX1cNVg>
, and thus difficult to measure, rec...
2010 Jul 18
6
CRAN (and crantastic) updates this week
...istics such as powers for
estimators of the components of a logistic regression model.
* TreePar (1.0)
Tanja Stadler
http://crantastic.org/packages/TreePar
For a given phylogeny on present day data (e.g. species or viruses), a
likelihood method is provided where the maximum likelihood
speciation and extinction rates are estimated. The method accounts
for rate changes and mass extinction events: Time is split into
intervals, and in each interval, the rates can be different.
Throughout an interval, the rates stay constant. At the end of an
interval, a pre-defined fraction of the exta...