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% Generated by roxygen2 (4.1.1): do not edit by hand
% Please edit documentation in R/basic.R
\name{tail_of}
\alias{tail_of}
\title{Tails of the edge(s) in a graph}
\usage{
tail_of(graph, es)
}
\arguments{
\item{graph}{The input graph.}
\item{es}{The edges to query.}
}
\value{
A vertex sequence with the tail(s) of the edge(s).
}
\description{
For undirected graphs, head and tail is not defined. In this case
\code{tail_of} returns vertices incident to the supplied edges, and
\code{head_of} returns the other end(s) of the edge(s).
}
\seealso{
Other structural queries: \code{\link{[.igraph}};
\code{\link{[[.igraph}}; \code{\link{adjacent_vertices}};
\code{\link{are.connected}}, \code{\link{are_adjacent}};
\code{\link{ecount}}, \code{\link{gsize}};
\code{\link{ends}}, \code{\link{get.edge}},
\code{\link{get.edges}}; \code{\link{get.edge.ids}};
\code{\link{gorder}}, \code{\link{vcount}};
\code{\link{head_of}}; \code{\link{incident_edges}};
\code{\link{incident}}; \code{\link{is.directed}},
\code{\link{is_directed}}; \code{\link{neighbors}}
}
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