marginReconGeoSSE: Ancestral State Estimation based on Marginal Reconstruction...

In hisse: Hidden State Speciation and Extinction

Ancestral State Estimation based on Marginal Reconstruction for the GeoSSE and GeoHiSSE models.

Description

Estimates the likeliest states for both internal nodes and tips of a phylogeny using the marginal reconstruction algorithm.

Usage

MarginReconGeoSSE(phy, data, f, pars, hidden.states=1, 
assume.cladogenetic=TRUE, condition.on.survival=TRUE, 
root.type="madfitz", root.p=NULL, AIC=NULL, get.tips.only=FALSE,
verbose=TRUE, n.cores=NULL, dt.threads=1)

Arguments

phy	a phylogenetic tree, in ape “phylo” format and with internal nodes labeled denoting the ancestral selective regimes.
data	a data matrix containing species information (see Details).
f	vector of length 3 with the estimated proportion of extant species in area 00, 11, and 01 that are included in the phylogeny. A value of c(0.25, 0.5, 0.25) means that 25 percent of species in state 00 and 01 and 50 percent of species in state 11 are included in the phylogeny. By default all species are assumed to be known.
pars	vector containing the MLE of the parameters.
hidden.states	a numeric indicating the number of shifts. The default is 1 meaning a standard GeoSSE model.
assume.cladogenetic	a logical indicating whether the model assumes that changes occurr at the nodes. The default is TRUE. Setting this to FALSE will result in a different models from GeoSSE. Please check hisse::GeoHiSSE for more details.
condition.on.survival	a logical indicating whether the likelihood should be conditioned on the survival of two lineages and the speciation event subtending them (Nee et al. 1994). The default is TRUE.
root.type	indicates whether root prior assumption should based the procedure described by FitzJohn et al. 2009, “madfitz”, assumed equal, “equal”, or set to user, “user”.
root.p	a vector indicating fixed root state probabilities. The default is NULL.
AIC	the AIC for the model being used for the reconstruction. This is used by the plotting function. The default is NULL.
get.tips.only	a logical indicating whether just tip reconstructions should be output. The default is FALSE.
verbose	a logical indicating whether progress should be printed to screen. The default is TRUE.
n.cores	specifies the number of independent processors to conduct the analysis.. The default is NULL.
dt.threads	sets the number of threads available to data.table. In practice this need not change from the default of 1 thread, as we have not seen any speedup from allowing more threads.

Details

In this implementation the marginal probability of area i for a focal node is simply the overall likelihood of the tree and data when the area of the focal node is fixed in area i. Note that the likeliest tip areas can also be estimated: we observe area 11, but the underlying area could either be area 11A or 11B. Thus, for any given node or tip we traverse the entire tree as many times as there are areas in the model. As the size of the tree grows, however, these repeated tree traversals can slow the calculation down considerably. For this reason, we allow the marginal calculation to be conducted in parallel across any number of independent computer processors.

For user-specified “root.p”, you should specify the probability for each area. If you are doing a hidden model, the number of parameters will depend on the number of hidden states included. For a two classes model there are six areas: 00A, 11A, 01A, 00B, 11B, 01B. So if you wanted to say the root had to be area A, you would specify “root.p = c(0.5, 0, 0, 0.5, 0, 0)”. The root area is 00, but there is an equal chance for hidden states A or B.

See help for “GeoHiSSE” for more on other parameters for this function.

Value

MarginReconGeoSSE returns an object of class geohisse.states. This is a list with elements:

$node.mat	the marginal probabilities calculated for each node. They are ordered based on the elements in the edge matrix in “phylo” format.
$tip.mat	the marginal probabilities calculated for each tip. They are ordered based on the order of tip labels in the tree.
$rate.mat	a matrix that details the rates for each state combination. This is used by the plotting function.
$phy	a phylogenetic tree in the “phylo” format that contains the states with the highest marginal probability at each internal node.

Author(s)

Jeremy M. Beaulieu

References

Beaulieu, J.M, and B.C. O'Meara. 2016. Detecting hidden diversification shifts in models of trait-dependent speciation and extinction. Syst. Biol. 65:583-601.

FitzJohn R.G., Maddison W.P., and Otto S.P. 2009. Estimating trait-dependent speciation and extinction rates from incompletely resolved phylogenies. Syst. Biol. 58:595-611.

Goldberg, E. E., L. T. Lancaster, and R. H. Ree. 2011. Phylogenetic Inference of Reciprocal Effects between Geographic Range Evolution and Diversification. Syst. Biol. 60:451-465.

Maddison W.P., Midford P.E., and Otto S.P. 2007. Estimating a binary characters' effect on speciation and extinction. Syst. Biol. 56:701-710.

Nee S., May R.M., and Harvey P.H. 1994. The reconstructed evolutionary process. Philos. Trans. R. Soc. Lond. B Biol. Sci. 344:305-311.

hisse documentation built on Feb. 16, 2023, 10:26 p.m.