6 \title{Print Summary of a Phylogeny}
8 \method{summary}{phylo}(object, \dots)
10 Nnode(phy, internal.only = TRUE)
14 \item{object, phy}{an object of class \code{"phylo"}.}
15 \item{\dots}{further arguments passed to or from other methods.}
16 \item{internal.only}{a logical indicating whether to return the number
17 of internal nodes only (the default), or of internal and terminal
18 (tips) nodes (if \code{FALSE}).}
21 The first function prints a compact summary of a phylogenetic tree (an
22 object of class \code{"phylo"}). The three other functions return the
23 number of tips, nodes, or edges, respectively.
26 The summary includes the numbers of tips and of nodes, summary
27 statistics of the branch lengths (if they are available) with mean,
28 variance, minimum, first quartile, median, third quartile, and
29 maximum, listing of the first ten tip labels, and (if available) of
30 the first ten node labels. It is also printed whether some of these
31 optional elements (branch lengths, node labels, and root edge) are not
34 \code{summary} simply prints its results on the standard output and is
35 not meant for programming.
38 A NULL value in the case of \code{summary}, a single numeric value for
39 the three other functions.
41 \author{Emmanuel Paradis}
43 \code{\link{read.tree}}, \code{\link[base]{summary}} for the generic R
44 function, \code{\link{multiphylo}}, \code{\link{c.phylo}}
48 summary(bird.families)