R igraph manual pages

Use this if you are using igraph from R

Head of the edge(s) in a graph

Description

For undirected graphs, head and tail is not defined. In this case head_of returns vertices incident to the supplied edges, and tail_of returns the other end(s) of the edge(s).

Usage

head_of(graph, es)

Arguments

graph

The input graph.

es

The edges to query.

Value

A vertex sequence with the head(s) of the edge(s).

See Also

Other structural queries: [.igraph, [[.igraph, adjacent_vertices, are_adjacent, ends, get.edge.ids, gorder, gsize, incident_edges, incident, is_directed, neighbors, tail_of


[Package igraph version 1.2.4.1 Index]