[R] Binary Tree Testing in "ape" package (a bug?)

[Christoph Heibl]

If I am right informed, 'is.binary.tree' cannot test for root  
polytomies.

Consider this example:

tree.hiv <- read.tree(text="((rat,mouse,(human,chimp)), kangaroo);")
is.binary.tree(tree.hiv) 		# will yield 'FALSE'


For further questions you might be better advised to use the 'R-sig- 
phylo' mailing list.






________________________________________________________

Christoph Heibl

Systematic Botany
Ludwig-Maximilians-Universität München
Menzinger Str. 67
D-80638 München
GERMANY

phone:     +49-(0)89-17861-251
e-mail:    heibl at lmu.de

http://www.christophheibl.de/ch-home.html





On Sep 4, 2008, at 5:27 AM, Gundala Viswanath wrote:

> Dear all,
>
> I was testing the wonderful package APE.
>
> However upon testing a particular Newick's format
> tree - which I think to be a non-binary tree -
> it yields different result as expected.
>
>> library(ape)
>> tree.hiv <- read.tree(text="(rat,mouse,(human,chimp));")
>> is.binary.tree(tree.hiv)
> [1] TRUE
>
> Was that a bug in APE package?
>
> - Gundala Viswanath
> Jakarta - Indonesia
>
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