Add vertices to a graph
If attributes are supplied, and they are not present in the graph,
their values for the original vertices of the graph are set to
NA.
add_vertices(graph, nv, ..., attr = list())
graph |
The input graph. |
nv |
The number of vertices to add. |
... |
Additional arguments, they must be named, and they will be added as vertex attributes, for the newly added vertices. See also details below. |
attr |
A named list, its elements will be added as vertex attributes, for the newly added vertices. See also details below. |
The graph, with the vertices (and attributes) added.
Other functions for manipulating graph structure:
+.igraph(),
add_edges(),
delete_edges(),
delete_vertices(),
edge(),
igraph-minus,
path(),
vertex()
g <- make_empty_graph() %>% add_vertices(3, color = "red") %>% add_vertices(2, color = "green") %>% add_edges(c(1,2, 2,3, 3,4, 4,5)) g V(g)[[]] plot(g)
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