Hi Juan.
I'm pretty sure that by ape phylo convention all node numbers in
tree$edge are such that all descendants node numbers ancestor node
numbers. To assign numbers to node labels such that the reverse is true
(and such that node numbers go from 1:tree$Nnode) you can do:
tree$node.label-tree$Nnode:1
To check, try:
library(phytools)
tree$node.label-tree$Nnode:1
plotTree(tree,setEnv=TRUE)
nodelabels(tree$node.label)
I think this is what you mean. - Liam
Liam J. Revell, Assistant Professor of Biology
University of Massachusetts Boston
web: http://faculty.umb.edu/liam.revell/
email: liam.rev...@umb.edu
blog: http://blog.phytools.org
On 7/5/2013 11:33 AM, Juan Antonio Balbuena wrote:
Hello
Sorry for this apparently simple question, but could not find the right
answer on the internet.
For a given phylo object in ape consisting of n tips, how can I assign
unique node numbers from 1 to 2n-1, such that if a node i is ancestral
to a node k, i k?
Thanks for your attention.
Juan A. Balbuena
--
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Marine Zoology Unit
Cavanilles Institute of Biodiversity and Evolutionary Biology
University of Valencia http://www.uv.es/~balbuena
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