Incident edges of multiple vertices in a graph

This function is similar to incident(), but it queries multiple vertices at once.

Usage

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

Arguments

graph

Input graph.

v

The vertices to query

mode

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

Value

A list of edge sequences.

See also

Other structural queries: [.igraph(), [[.igraph(), adjacent_vertices(), are_adjacent(), ends(), get_edge_ids(), gorder(), gsize(), head_of(), incident(), is_directed(), neighbors(), tail_of()

Examples

g <- make_graph("Zachary")
incident_edges(g, c(1, 34))
#> [[1]]
#> + 16/78 edges from e074d29:
#>  [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
#> 
#> [[2]]
#> + 17/78 edges from e074d29:
#>  [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
#>