The three methods are described below:
\itemize{
- \item{``number''}{The labels are created with 1, 2, \dots suffixed
+ \item{``number''}{The labels are created with 1, 2, \dots prefixed
with the argument \code{prefix}; thus the default is to have
Node1, Node2, \dots Set \code{prefix = ""} to have only numbers.}
\item{``md5sum''}{For each node, the labels of the tips descendant