Use this if you are using igraph from R
| delete_vertices {igraph} | R Documentation | 
Delete vertices from a graph
delete_vertices(graph, v)
| graph | The input graph. | 
| v | The vertices to remove, a vertex sequence. | 
The graph, with the vertices removed.
Other functions for manipulating graph structure: 
+.igraph(),
add_edges(),
add_vertices(),
delete_edges(),
edge(),
igraph-minus,
path(),
vertex()
g <- make_ring(10) %>%
  set_vertex_attr("name", value = LETTERS[1:10])
g
V(g)
g2 <- delete_vertices(g, c(1,5)) %>%
  delete_vertices("B")
g2
V(g2)