Perfect, thanks.

Yan

On 7 Feb 2017, at 13:40, Emmanuel Paradis <emmanuel.para...@ird.fr> wrote:

> Hi,
> 
> If you have a single tree (object of class "phylo")
> 
> phy$root.edge <- 0
> 
> If there are several trees in your NEXUS file (then phy is of class 
> "multiPhylo"):
> 
> for (i in seq_along(phy)) phy[[i]]$root.edge <- 0

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