org.jgrapht.generate

Class GnmRandomBipartiteGraphGenerator<V,E>

java.lang.Object

org.jgrapht.generate.GnmRandomBipartiteGraphGenerator<V,E>

Type Parameters:

V - the graph vertex type

E - the graph edge type

All Implemented Interfaces:

GraphGenerator<V,E,V>

public class GnmRandomBipartiteGraphGenerator<V,E>
extends java.lang.Object
implements GraphGenerator<V,E,V>

Create a random bipartite graph based on the G(n, M) Erdős–Rényi model. See the Wikipedia article for details and references about Random Graphs and the Erdős–Rényi model . The user provides the sizes n1 and n2 of the two partitions (n1+n2=n) and a number m which is the total number of edges to create. The generator supports both directed and undirected graphs.

Since:

Sep 13, 2004

See Also:

GnpRandomBipartiteGraphGenerator

Constructor Summary

Constructors

Constructor and Description
GnmRandomBipartiteGraphGenerator(int n1, int n2, int m) Create a new random bipartite graph generator.
GnmRandomBipartiteGraphGenerator(int n1, int n2, int m, long seed) Create a new random bipartite graph generator.
GnmRandomBipartiteGraphGenerator(int n1, int n2, int m, java.util.Random rng) Create a new random bipartite graph generator.

Method Summary

Modifier and Type	Method and Description
void	generateGraph(Graph<V,E> target, VertexFactory<V> vertexFactory, java.util.Map<java.lang.String,V> resultMap) Generates a random bipartite graph.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

GnmRandomBipartiteGraphGenerator

public GnmRandomBipartiteGraphGenerator(int n1,
                                        int n2,
                                        int m)

Create a new random bipartite graph generator. The generator uses the G(n, m) model when n = n1 + n2 and the bipartite graph has one partition with size n1 and one partition with size n2. In this model a graph is chosen uniformly at random from the collection of bipartite graphs whose partitions have sizes n1 and n2 respectively and m edges.

Parameters:

n1 - number of vertices of the first partition

n2 - number of vertices of the second partition

m - the number of edges

GnmRandomBipartiteGraphGenerator

public GnmRandomBipartiteGraphGenerator(int n1,
                                        int n2,
                                        int m,
                                        long seed)

Create a new random bipartite graph generator. The generator uses the G(n, m) model when n = n1 + n2 and the bipartite graph has one partition with size n1 and one partition with size n2. In this model a graph is chosen uniformly at random from the collection of bipartite graphs whose partitions have sizes n1 and n2 respectively and m edges.

Parameters:

n1 - number of vertices of the first partition

n2 - number of vertices of the second partition

m - the number of edges

seed - seed for the random number generator

GnmRandomBipartiteGraphGenerator

public GnmRandomBipartiteGraphGenerator(int n1,
                                        int n2,
                                        int m,
                                        java.util.Random rng)

Create a new random bipartite graph generator. The generator uses the G(n, m) model when n = n1 + n2 and the bipartite graph has one partition with size n1 and one partition with size n2. In this model a graph is chosen uniformly at random from the collection of bipartite graphs whose partitions have sizes n1 and n2 respectively and m edges.

Parameters:

n1 - number of vertices of the first partition

n2 - number of vertices of the second partition

m - the number of edges

rng - random number generator

Method Detail

generateGraph

public void generateGraph(Graph<V,E> target,
                          VertexFactory<V> vertexFactory,
                          java.util.Map<java.lang.String,V> resultMap)

Generates a random bipartite graph.

Specified by:

generateGraph in interface GraphGenerator<V,E,V>

Parameters:

target - the target graph

vertexFactory - the vertex factory

resultMap - not used by this generator, can be null