Extended Data Fig. 4: Identification of optimal number of clusters.
From: Critical intervention points for European adaptation to cascading climate change impacts
(a) The elbow method analyzes the sum of squared distances in dependence of the number of k-Means based clusters of 102 countries with respect to their PageRank importance vectors. The result yields an optimal number of three. (b) The silhouette score for intra cluster cohesion and extra cluster separation confirms the number of three clusters.
