Use this if you are using igraph from R
A vertex is a neighbor of another one (in other words, the two vertices are adjacent), if they are incident to the same edge.
neighbors(graph, v, mode = c("out", "in", "all", "total"))
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. |
A vertex sequence containing the neighbors of the input vertex.
Other structural queries:
[.igraph()
,
[[.igraph()
,
adjacent_vertices()
,
are_adjacent()
,
ends()
,
get.edge.ids()
,
gorder()
,
gsize()
,
head_of()
,
incident_edges()
,
incident()
,
is_directed()
,
tail_of()
g <- make_graph("Zachary") n1 <- neighbors(g, 1) n34 <- neighbors(g, 34) intersection(n1, n34)