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phytools (version 0.4-45)

fastMRCA: Get the MRCA (or height above the root of the MRCA) of a pair of tip taxa

Description

This function returns the most recent common ancestor (node number) for a pair of taxa; or, in the case of fastHeight, the height above the root of the MRCA of a pair of taxa.

Usage

fastMRCA(tree, sp1, sp2)
fastHeight(tree, sp1, sp2)

Arguments

tree
a phylogenetic tree as an object of class "phylo".
sp1
species name.
sp2
species name.

Value

  • The node number of the MRCA or the height above the root (for fastHeight).

Details

This function is mostly redundant with findMRCA (or findMRCA(...,type="height") in the case of fastHeight) but for very large trees will be considerably faster.

References

Revell, L. J. (2012) phytools: An R package for phylogenetic comparative biology (and other things). Methods Ecol. Evol., 3, 217-223.

See Also

findMRCA, mrca

Examples

Run this code
tree<-pbtree(n=2000)
anc<-fastMRCA(tree,"t1","t15")

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