balance_score: balancedness of signed network

In signnet: Methods to Analyse Signed Networks

balancedness of signed network

Description

Implements several indices to assess the balancedness of a network.

Usage

balance_score(g, method = "triangles")

Arguments

g	igraph object with a sign edge attribute.
method	string indicating the method to be used. See details for options

Details

The method parameter can be one of

triangles

Fraction of balanced triangles. Maximal (=1) if all triangles are balanced.

walk

\sum exp(\lambda_i) / \sum exp(\mu_i)

where \lambda_i are the eigenvalues of the signed adjacency matrix and \mu_i of the unsigned adjacency matrix. Maximal (=1) if all walks are balanced.

frustration

The frustration index assumes that the network can be partitioned into two groups, where intra group edges are positive and inter group edges are negative. The index is defined as the sum of intra group negative and inter group positive edges. Note that the problem is NP complete and only an upper bound is returned (based on simulated annealing). Exact methods can be found in the work of Aref. The index is normalized such that it is maximal (=1) if the network is balanced.

Value

numeric balancedness score between 0 and 1

Author(s)

David Schoch

References

Estrada, E. (2019). Rethinking structural balance in signed social networks. Discrete Applied Mathematics.

Samin Aref, Mark C Wilson (2018). Measuring partial balance in signed networks. Journal of Complex Networks, 6(4): 566–595, https://doi.org/10.1093/comnet/cnx044

Examples

library(igraph)
g <- graph.full(4)
E(g)$sign <- c(-1, 1, 1, -1, -1, 1)

balance_score(g, method = "triangles")
balance_score(g, method = "walk")

signnet documentation built on Sept. 9, 2023, 1:06 a.m.