Create a directed graph
Examples
g <- Graph()
add_vertices(g, 3)
#> [1] 1 2 3
add_edge(g, 1, 2)
#> [1] 1
add_edge(g, 2, 3)
#> [1] 2
nv(g) # 3
#> [1] 3
ne(g) # 2
#> [1] 2
Create a directed graph
g <- Graph()
add_vertices(g, 3)
#> [1] 1 2 3
add_edge(g, 1, 2)
#> [1] 1
add_edge(g, 2, 3)
#> [1] 2
nv(g) # 3
#> [1] 3
ne(g) # 2
#> [1] 2