Spectral Complexity of Directed Graphs and Application to Structural Decomposition

Figure 14

The ratio of the number of edges going from cluster X to cluster Y to the number of edges inside cluster X depending on the percentage of nodes in all clusters for Wikipedia who-votes-on-whom network. Cluster X can be cluster C1 or cluster C2 and cluster Y can be cluster C1 or cluster C2. The asterisk shows the point where the sum of two ratios is the maximum.