Inference of the number of clusters in the extended HGDP-CEPH data. This graph shows the output of the function find.clusters used to identify the number of clusters in extended HGDP-CEPH data. Bayesian information criterion (BIC) is provided for different numbers of clusters (from one to 100). The chosen number of clusters (4) is circled in red. The inset indicates the global results (up to 100 clusters), while the main figure shows the detail of the results up to 30 clusters.