Use this if you are using igraph from R
| delete_edges {igraph} | R Documentation | 
Delete edges from a graph
delete_edges(graph, edges)
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
  | 
The graph, with the edges removed.
Other functions for manipulating graph structure: 
+.igraph(),
add_edges(),
add_vertices(),
delete_vertices(),
edge(),
igraph-minus,
path(),
vertex()
g <- make_ring(10) %>%
  delete_edges(seq(1, 9, by = 2))
g
g <- make_ring(10) %>%
  delete_edges("10|1")
g
g <- make_ring(5)
g <- delete_edges(g, get.edge.ids(g, c(1,5, 4,5)))
g