vcv.phylo {ape} | R Documentation |
This function computes the expected variances and covariances of a continuous phenotype assuming it evolves under a given model (currently only the model of Brownian motion is available).
vcv.phylo(phy, model = "Brownian", cor = FALSE)
phy |
an object of class "phylo" . |
model |
a character giving the model used to compute the
variances and covariances of the phynotype; by default
"Brownian" . Currently only the Brownian model is available. |
cor |
a logical indicating whether the correlation matrix should
be returned (TRUE ); by default the variance-covariance matrix
is returned (FALSE ). |
a numeric matrix with the names of the tips (as given by the tip.label
of the argument phy
) as colnames and rownames.
Emmanuel Paradis paradis@isem.univ-montp2.fr
Garland, T. Jr. and Ives, A. R. (2000) Using the past to predict the present: confidence intervals for regression equations in phylogenetic comparative methods. American Naturalist, 155, 346–364.
read.tree
to read tree files in Newick format