Incident edges of a vertex in a graph — incident • igraph

Incident edges of a vertex in a graph

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.

Value

An edge sequence containing the incident edges of the input vertex.

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 0b7cba5:
#>  [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 0b7cba5:
#>  [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