igraph (version 0.7.1)

walktrap.community: Community strucure via short random walks

Description

This function tries to find densely connected subgraphs, also called communities in a graph via random walks. The idea is that short random walks tend to stay in the same community.

Usage

walktrap.community(graph, weights = E(graph)$weight, steps = 4, merges =
          TRUE, modularity = TRUE, membership = TRUE)

Arguments

graph

The input graph, edge directions are ignored in directed graphs.

weights

The edge weights.

steps

The length of the random walks to perform.

merges

Logical scalar, whether to include the merge matrix in the result.

modularity

Logical scalar, whether to include the vector of the modularity scores in the result. If the membership argument is true, then it will be always calculated.

membership

Logical scalar, whether to calculate the membership vector for the split corresponding to the highest modularity value.

Value

• walktrap.community returns a communities object, please see the communities manual page for details.

concept

• Random walk
• Community structure

Details

This function is the implementation of the Walktrap community finding algorithm, see Pascal Pons, Matthieu Latapy: Computing communities in large networks using random walks, http://arxiv.org/abs/physics/0512106

References

Pascal Pons, Matthieu Latapy: Computing communities in large networks using random walks, http://arxiv.org/abs/physics/0512106

See Also

See communities on getting the actual membership vector, merge matrix, modularity score, etc. modularity and fastgreedy.community, spinglass.community, leading.eigenvector.community, edge.betweenness.community for other community detection methods.

Examples

g <- graph.full(5) %du% graph.full(5) %du% graph.full(5)
g <- add.edges(g, c(1,6, 1,11, 6, 11))
walktrap.community(g)