Delete edges from a graph

Delete edges from a graph

Usage

delete_edges(graph, edges)

Arguments

graph

The input graph.

edges

The edges to remove, specified as an edge sequence. Typically this is either a numeric vector containing edge IDs, or a character vector containing the IDs or names of the source and target vertices, separated by |

Value

The graph, with the edges removed.

Related documentation in the C library

delete_edges(), get_eids(), edges(), ecount(), vcount()

See also

Other functions for manipulating graph structure: +.igraph(), add_edges(), add_vertices(), complementer(), compose(), connect(), contract(), delete_vertices(), difference(), difference.igraph(), disjoint_union(), edge(), igraph-minus, intersection(), intersection.igraph(), path(), permute(), rep.igraph(), reverse_edges(), simplify(), transitive_closure(), union(), union.igraph(), vertex()

Examples

g <- make_ring(10) %>%
  delete_edges(seq(1, 9, by = 2))
g
#> ── <igraph> Ring graph ────────────────────────────────────────────── 36e73df ──
#> ℹ undirected
#> ℹ 10 vertices · 5 edges
#> 
#> ── Attributes ──────────────────────────────────────────────────────────────────
#> → graph:  name <chr>, mutual <lgl>, circular <lgl>
#> 
#> ── Edges ───────────────────────────────────────────────────────────────────────
#> [1] 2 ─ 3   4 ─ 5   6 ─ 7   8 ─ 9   1 ─ 10 

g <- make_ring(10) %>%
  delete_edges("10|1")
g
#> ── <igraph> Ring graph ────────────────────────────────────────────── ffcf22f ──
#> ℹ undirected
#> ℹ 10 vertices · 9 edges
#> 
#> ── Attributes ──────────────────────────────────────────────────────────────────
#> → graph:  name <chr>, mutual <lgl>, circular <lgl>
#> 
#> ── Edges ───────────────────────────────────────────────────────────────────────
#> [1] 1 ─ 2   2 ─ 3   3 ─ 4   4 ─ 5   5 ─ 6   6 ─ 7   7 ─ 8   8 ─ 9   9 ─ 10 

g <- make_ring(5)
g <- delete_edges(g, get_edge_ids(g, c(1, 5, 4, 5)))
g
#> ── <igraph> Ring graph ────────────────────────────────────────────── 60d5563 ──
#> ℹ undirected
#> ℹ 5 vertices · 3 edges
#> 
#> ── Attributes ──────────────────────────────────────────────────────────────────
#> → graph:  name <chr>, mutual <lgl>, circular <lgl>
#> 
#> ── Edges ───────────────────────────────────────────────────────────────────────
#> [1] 1 ─ 2  2 ─ 3  3 ─ 4