ape (version 2.7-3)

corGrafen: Grafen's (1989) Correlation Structure

Description

Grafen's (1989) covariance structure. Branch lengths are computed using Grafen's method (see compute.brlen). The covariance matrice is then the traditional variance-covariance matrix for a phylogeny.

Usage

corGrafen(value, phy, form=~1, fixed = FALSE)
## S3 method for class 'corGrafen':
coef(object, unconstrained = TRUE, ...)
## S3 method for class 'corGrafen':
corMatrix(object,
                  covariate = getCovariate(object), corr = TRUE, ...)

Value

An object of class corGrafen or the rho coefficient from an object of this class or the correlation matrix of an initialized object of this class.

References

Grafen, A. (1989) The phylogenetic regression. Philosophical Transactions of the Royal society of London. Series B. Biological Sciences, 326, 119--157.

See Also

corClasses, compute.brlen, vcv.phylo.