| phyl.vcv {phytools} | R Documentation |
Primarily an internal function for phyl.pca; this can be used to compute the phylogenetic trait variance-covariance matrix given a phylogenetic VCV, lambda, and a data matrix. Should not be confused with vcv.phylo in the "ape" package (although one of the objects returned is the output of vcv.phylo).
phyl.vcv(X, C, lambda)
lambda |
value for λ transformation. |
X |
data matrix. |
C |
matrix containing the height above the root of each pair of species in the tree. Typically this will have been produced by calling |
Do not use unless you know what you're doing.
A list containing three elements, as follows: C, the matrix vcv.phylo transformed by lambda; R, the among trait variance-covariance matrix for the data in X; and alpha, a vector of ancestral states at the root node of the tree.
Liam Revell liam.revell@umb.edu
Revell, L. J. (2012) phytools: An R package for phylogenetic comparative biology (and other things). Methods Ecol. Evol., 3, 217-223.