# make_star: Create a star graph, a tree with n vertices and n - 1 leaves In igraph: Network Analysis and Visualization

## Description

`star` creates a star graph, in this every single vertex is connected to the center vertex and nobody else.

## Usage

 ```1 2 3``` ```make_star(n, mode = c("in", "out", "mutual", "undirected"), center = 1) star(...) ```

## Arguments

 `n` Number of vertices. `mode` It defines the direction of the edges, `in`: the edges point to the center, `out`: the edges point from the center, `mutual`: a directed star is created with mutual edges, `undirected`: the edges are undirected. `center` ID of the center vertex. `...` Passed to `make_star`.

## Value

An igraph graph.

Other determimistic constructors: `graph_from_atlas()`, `graph_from_edgelist()`, `graph_from_literal()`, `make_chordal_ring()`, `make_empty_graph()`, `make_full_citation_graph()`, `make_full_graph()`, `make_graph()`, `make_lattice()`, `make_ring()`, `make_tree()`

## Examples

 ```1 2``` ```make_star(10, mode = "out") make_star(5, mode = "undirected") ```

### Example output

```Attaching package: 'igraph'

The following objects are masked from 'package:stats':

decompose, spectrum

The following object is masked from 'package:base':

union

IGRAPH 0b00000 D--- 10 9 -- Out-star
+ attr: name (g/c), mode (g/c), center (g/n)
+ edges from 0b00000:
 1-> 2 1-> 3 1-> 4 1-> 5 1-> 6 1-> 7 1-> 8 1-> 9 1->10
IGRAPH 0600000 U--- 5 4 -- Star
+ attr: name (g/c), mode (g/c), center (g/n)
+ edges from 0600000:
 1--2 1--3 1--4 1--5
```

igraph documentation built on Oct. 15, 2021, 5:06 p.m.