symmoments (version 1.2.1.1)

toMatching: Convert representation of a phylogenetic tree as a moment L-matrix to matching form

Description

Function converts a tree in moment format to matching format.

The input can be an L-matrix object, a square L matrix, or an L matrix in reduced upper-triangular (vector) form.

The toMatching function sets its list output to class L-matching, which has 5 components, including the tree in matching format.

Usage

toMatching(L, type = NULL, tip.label = NULL)

Value

a matching representation of the phylogenetic tree corresponding to the input

Arguments

L

An L-matrix object, a square L matrix, or an L matrix in reduced upper-triangular (vector) form.

type

If object is not of class "L-matrix" and is a square L matrix, then type should be "square'. If it is an L matrix in upper triangular form, type should be "ut".

tip.label

Character vector containing labels for tips. If null, labels default to "a"-"z" it at most 26; otherwise, 3-letter labels of the form "aaa", "aab",...

Author

Kem Phillips <[e-mail]

Details

An L-matrix object is a list with 5 components: "L" is the L-matrix in square form. "L.ut" is the L-matrix in upper-triangular form. "Newick" is the Newick representation of the tree. "tip.label" is the character vector of tip labels. "tip.label.n" is the number of tips.

References

K Phillips, Symbolic Computation of the Central Moments of the Multivariate Normal Distribution, Journal of Statistical Software, 2010.

P.W. Diaconis and S. Holmes, Matchings and Phylogenetic Trees, Proc. Natl. Acad. Sci., 1998, 95(25), 14600-14602

See Also

functions toMoment and toNewick

Examples

# create a Newick object
exam.Newick      <- "(((a,b),c),d);"
# convert to a moment L-matrix
exam.moment <- toMoment(exam.Newick)
# convert to matching format
exam.matching <- toMatching(exam.moment)