Use this if you are using igraph from R
The new edges are given as a vertex sequence, e.g. internal
numeric vertex ids, or vertex names. The first edge points from
edges[1]
to edges[2]
, the second from edges[3]
to edges[4]
, etc.
add_edges(graph, edges, ..., attr = list())
graph |
The input graph |
edges |
The edges to add, a vertex sequence with even number of vertices. |
... |
Additional arguments, they must be named, and they will be added as edge attributes, for the newly added edges. See also details below. |
attr |
A named list, its elements will be added as edge attributes, for the newly added edges. See also details below. |
If attributes are supplied, and they are not present in the graph,
their values for the original edges of the graph are set to NA
.
The graph, with the edges (and attributes) added.
Other functions for manipulating graph structure: +.igraph
,
add_vertices
, delete_edges
,
delete_vertices
, edge
,
igraph-minus
, path
,
vertex
g <- make_empty_graph(n = 5) %>% add_edges(c(1,2, 2,3, 3,4, 4,5)) %>% set_edge_attr("color", value = "red") %>% add_edges(c(5,1), color = "green") E(g)[[]] plot(g)