3 \title{Phylogenetic Variance-covariance or Correlation Matrix}
5 vcv.phylo(phy, model = "Brownian", cor = FALSE)
8 \item{phy}{an object of class \code{"phylo"}.}
9 \item{model}{a character giving the model used to compute the
10 variances and covariances of the phynotype; by default
11 \code{"Brownian"}. Currently only the Brownian model is available.}
12 \item{cor}{a logical indicating whether the correlation matrix should
13 be returned (\code{TRUE}); by default the variance-covariance matrix
14 is returned (\code{FALSE}).}
17 This function computes the expected variances and covariances of a
18 continuous phenotype assuming it evolves under a given model
19 (currently only the model of Brownian motion is available).
22 a numeric matrix with the names of the tips (as given by the \code{tip.label}
23 of the argument \code{phy}) as colnames and rownames.
26 Garland, T. Jr. and Ives, A. R. (2000) Using the past to predict the
27 present: confidence intervals for regression equations in phylogenetic
28 comparative methods. \emph{American Naturalist}, \bold{155}, 346--364.
31 \author{Emmanuel Paradis \email{Emmanuel.Paradis@mpl.ird.fr}}
33 \code{\link{read.tree}} to read tree files in Newick format
36 \keyword{multivariate}