Incident edges of a vertex in a graph
Usage
incident(graph, v, mode = c("all", "out", "in", "total"))Arguments
- graph
The input graph.
- v
The vertex of which the incident edges are queried.
- mode
Whether to query outgoing (‘out’), incoming (‘in’) edges, or both types (‘all’). This is ignored for undirected graphs.
See also
Other structural queries:
[.igraph(),
[[.igraph(),
adjacent_vertices(),
are_adjacent(),
ends(),
get.edge.ids(),
gorder(),
gsize(),
head_of(),
incident_edges(),
is_directed(),
neighbors(),
tail_of()
Examples
g <- make_graph("Zachary")
incident(g, 1)
#> + 16/78 edges from beadc5f:
#> [1] 1-- 2 1-- 3 1-- 4 1-- 5 1-- 6 1-- 7 1-- 8 1-- 9 1--11 1--12 1--13 1--14
#> [13] 1--18 1--20 1--22 1--32
incident(g, 34)
#> + 17/78 edges from beadc5f:
#> [1] 9--34 10--34 14--34 15--34 16--34 19--34 20--34 21--34 23--34 24--34
#> [11] 27--34 28--34 29--34 30--34 31--34 32--34 33--34