phylobase (version 0.6.8)

phylomat-class: matrix classes for phylobase

Description

Classes representing phylogenies as matrices

Usage

as_phylo4vcov(from, ...)

Arguments

from

a phylo4 object

...

optional arguments, to be passed to vcov.phylo in ape (the main useful option is cor, which can be set to TRUE to compute a correlation rather than a variance-covariance matrix)

Objects from the Class

These are square matrices (with rows and columns corresponding to tips, and internal nodes implicit) with different meanings depending on the type (variance-covariance matrix, distance matrix, etc.).

Examples

trString <- "(((Strix_aluco:4.2,Asio_otus:4.2):3.1,Athene_noctua:7.3):6.3,Tyto_alba:13.5);"
   tree.owls <- ape::read.tree(text=trString)
  o2 <- as(tree.owls,"phylo4")
  ov <- as(o2,"phylo4vcov")
  o3 <- as(ov,"phylo4")
  ## these are not completely identical, but are
  ## topologically identical ...

  ## edge matrices are in a different order:
  ## cf. o2@edge and o3@edge
  ## BUT the edge matrices are otherwise identical
  identical(o2@edge[order(o2@edge[,2]),],
            o3@edge[order(o3@edge[,2]),])

  ## There is left/right ambiguity here in the tree orders:
  ## in o2 the 5->6->7->1 lineage
  ## (terminating in Strix aluco)
  ## is first, in o3 the 5->6->3 lineage
  ## (terminating in Athene noctua) is first.