Add edges to a graph
The new edges are given as a vertex sequence, e.g. internal
numeric vertex ids, or vertex names. The first edge points from
edges, the second from
add_edges(graph, edges, ..., attr = list())
- The input graph
- 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.
- 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
- The graph, with the edges (and attributes) added.
Other functions for manipulating graph structure:
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)