an object of class \code{"phylo"} for \code{root} and \code{unroot}; a
single logical value for \code{is.rooted}.
}
-\author{Emmanuel Paradis \email{Emmanuel.Paradis@mpl.ird.fr}}
+\author{Emmanuel Paradis}
\seealso{
\code{\link{bind.tree}}, \code{\link{drop.tip}},
\code{\link{nodelabels}}, \code{\link{identify.phylo}}