Add an edge from s to t
Examples
g <- Graph()
add_vertices(g, 2)
#> [1] 1 2
add_edge(g, 1, 2)
#> [1] 1
edge_src(g, 1) # 1
#> [1] 1
edge_tgt(g, 1) # 2
#> [1] 2
Add an edge from s to t
g <- Graph()
add_vertices(g, 2)
#> [1] 1 2
add_edge(g, 1, 2)
#> [1] 1
edge_src(g, 1) # 1
#> [1] 1
edge_tgt(g, 1) # 2
#> [1] 2