5 \title{Phylogenetic Variance-covariance or Correlation Matrix}
8 \method{vcv}{phylo}(phy, model = "Brownian", corr = FALSE, ...)
9 \method{vcv}{corPhyl}(phy, corr = FALSE, ...)
12 \item{phy}{an object of the correct class (see above).}
13 \item{model}{a character giving the model used to compute the
14 variances and covariances; only \code{"Brownian"} is available (for
15 other models, a correlation structure may be used).}
16 \item{corr}{a logical indicating whether the correlation matrix should
17 be returned (\code{TRUE}); by default the variance-covariance matrix
18 is returned (\code{FALSE}).}
19 \item{\dots}{further arguments to be passed to or from other methods.}
22 This function computes the expected variances and covariances of a
23 continuous trait assuming it evolves under a given model.
25 This is a generic function with methods for objects of class
26 \code{"phylo"} and \code{"corPhyl"}.
29 a numeric matrix with the names of the tips as colnames and rownames.
32 Garland, T. Jr. and Ives, A. R. (2000) Using the past to predict the
33 present: confidence intervals for regression equations in phylogenetic
34 comparative methods. \emph{American Naturalist}, \bold{155}, 346--364.
37 \author{Emmanuel Paradis}
39 Do not confuse this function with \code{\link[stats]{vcov}} which
40 computes the variance-covariance matrix among parameters of a fitted
44 \code{\link{corBrownian}}, \code{\link{corMartins}},
45 \code{\link{corGrafen}}, \code{\link{corPagel}},
46 \code{\link{corBlomberg}}
52 vcv(corBrownian(1, tr))
56 \keyword{multivariate}