Create a star graph

In a star graph, every vertex connects only to the center.

Usage

graph_star(n, mode = 0L, center = 1L)

Arguments

n

An integer value, the number of vertices.

mode

An integer value, {0: OUT, 1: IN, 2: UNDIRECTED, 3: MUTUAL}

center

Id of the vertex which will be the center of the graph.

Value

An igraph_ptr object.

See also

Other deterministic generators: graph_create(), graph_empty(), graph_famous(), graph_full(), graph_kary_tree(), graph_square_lattice()

Examples

graph_star(4L, 0L)
#> $V  tibble [4 × 0] (S3: tbl_df/tbl/data.frame)
#>  Named list()
#> # A tibble: 3 × 2
#>    from    to
#>   <int> <int>
#> 1     1     2
#> 2     1     3
#> 3     1     4
graph_star(4L, 1L)
#> $V  tibble [4 × 0] (S3: tbl_df/tbl/data.frame)
#>  Named list()
#> # A tibble: 3 × 2
#>    from    to
#>   <int> <int>
#> 1     2     1
#> 2     3     1
#> 3     4     1
graph_star(4L, 2L)
#> $V  tibble [4 × 0] (S3: tbl_df/tbl/data.frame)
#>  Named list()
#> # A tibble: 3 × 2
#>    from    to
#>   <int> <int>
#> 1     2     1
#> 2     3     1
#> 3     4     1
graph_star(4L, 3L)
#> $V  tibble [4 × 0] (S3: tbl_df/tbl/data.frame)
#>  Named list()
#> # A tibble: 6 × 2
#>    from    to
#>   <int> <int>
#> 1     1     2
#> 2     2     1
#> 3     1     3
#> 4     3     1
#> 5     1     4
#> 6     4     1