| vcv2phylo {ape} | R Documentation |
Variance-Covariance Matrix to Tree
Description
This function transforms a variance-covariance matrix into a phylogenetic tree.
Usage
vcv2phylo(mat, tolerance = 1e-7)
Arguments
mat |
a square symmetric (positive-definite) matrix. |
tolerance |
the numeric tolerance used to compare the branch lengths. |
Details
The function tests if the matrix is symmetric and positive-definite (i.e., all its eigenvalues positive within the specified tolerance).
Value
an object of class "phylo".
Author(s)
Simon Blomberg
See Also
Examples
tr <- rtree(10)
V <- vcv(tr) # VCV matrix assuming Brownian motion
z <- vcv2phylo(V)
identical(tr, z) # FALSE
all.equal(tr, z) # TRUE
[Package ape version 5.8 Index]