# R igraph manual pages

Use this if you are using igraph from R

## Compares community structures using various metrics

### Description

This function assesses the distance between two community structures.

### Usage

compare(
comm1,
comm2,
method = c("vi", "nmi", "split.join", "rand", "adjusted.rand")
)


### Arguments

 comm1 A communities object containing a community structure; or a numeric vector, the membership vector of the first community structure. The membership vector should contain the community id of each vertex, the numbering of the communities starts with one. comm2 A communities object containing a community structure; or a numeric vector, the membership vector of the second community structure, in the same format as for the previous argument. method Character scalar, the comparison method to use. Possible values: ‘vi’ is the variation of information (VI) metric of Meila (2003), ‘nmi’ is the normalized mutual information measure proposed by Danon et al. (2005), ‘split.join’ is the split-join distance of can Dongen (2000), ‘rand’ is the Rand index of Rand (1971), ‘adjusted.rand’ is the adjusted Rand index by Hubert and Arabie (1985).

A real number.

### Author(s)

Tamas Nepusz ntamas@gmail.com

### References

Meila M: Comparing clusterings by the variation of information. In: Scholkopf B, Warmuth MK (eds.). Learning Theory and Kernel Machines: 16th Annual Conference on Computational Learning Theory and 7th Kernel Workshop, COLT/Kernel 2003, Washington, DC, USA. Lecture Notes in Computer Science, vol. 2777, Springer, 2003. ISBN: 978-3-540-40720-1.

Danon L, Diaz-Guilera A, Duch J, Arenas A: Comparing community structure identification. J Stat Mech P09008, 2005.

van Dongen S: Performance criteria for graph clustering and Markov cluster experiments. Technical Report INS-R0012, National Research Institute for Mathematics and Computer Science in the Netherlands, Amsterdam, May 2000.

Rand WM: Objective criteria for the evaluation of clustering methods. J Am Stat Assoc 66(336):846-850, 1971.

Hubert L and Arabie P: Comparing partitions. Journal of Classification 2:193-218, 1985.

See cluster_walktrap, cluster_spinglass, cluster_leading_eigen, cluster_edge_betweenness, cluster_fast_greedy, cluster_label_prop cluster_louvain cluster_leiden for various community detection methods.

### Examples


g <- make_graph("Zachary")
sg <- cluster_spinglass(g)