R: Create a random regular graph

sample_k_regular {igraph} | R Documentation

## Create a random regular graph

### Description

Generate a random graph where each vertex has the same degree.

### Usage

    sample_k_regular(no.of.nodes, k, directed = FALSE, multiple = FALSE)

### Arguments

`no.of.nodes` | Integer scalar, the number of vertices in the generated graph.
`k` | Integer scalar, the degree of each vertex in the graph, or the out-degree and in-degree in a directed graph.
`directed` | Logical scalar, whether to create a directed graph.
`multiple` | Logical scalar, whether multiple edges are allowed.

### Details

This game generates a directed or undirected random graph where the degrees of vertices are equal to a predefined constant k. For undirected graphs, at least one of k and the number of vertices must be even.

The game simply uses `sample_degseq` with appropriately constructed degree sequences.

### Value

An igraph graph.

### Author(s)

Tamas Nepusz ntamas@gmail.com

### See Also

`sample_degseq` for a generator with prescribed degree sequence.

### Examples

    ## A simple ring
    ring <- sample_k_regular(10, 2)
    plot(ring)

    ## k-regular graphs on 10 vertices, with k=1:9
    k10 <- lapply(1:9, sample_k_regular, no.of.nodes=10)

    layout(matrix(1:9, nrow=3, byrow=TRUE))
    sapply(k10, plot, vertex.label=NA)

[Package igraph version 1.2.4.1 Index]