igraph (version 1.0.0)

neighbors: Neighboring (adjacent) vertices in a graph

Description

A vertex is a neighbor of another one (in other words, the two vertices are adjacent), if they are incident to the same edge.

Usage

neighbors(graph, v, mode = c("out", "in", "all", "total"))

Arguments

graph

The input graph.

v

The vertex of which the adjacent vertices are queried.

mode

Whether to query outgoing (out), incoming (in) edges, or both types (all). This is ignored for undirected graphs.

Value

• A vertex sequence containing the neighbors of the input vertex.

See Also

Other structural queries: [.igraph; [[.igraph; adjacent_vertices; are.connected, are_adjacent; ecount, gsize; ends, get.edge, get.edges; get.edge.ids; gorder, vcount; head_of; incident_edges; incident; is.directed, is_directed; tail_of

Examples

g <- make_graph("Zachary")
n1 <- neighbors(g, 1)
n34 <- neighbors(g, 34)
intersection(n1, n34)