Quantitative description of data sets: <i>M</i> is the number of points, <i>H</i>[<i>σ</i>] is the entropy of the ground truth classification.

d1—d2 represents the conformity among the different goodness metrics (purity, NMI and ARI) in terms of Kendall’s and Spearman’s rank correlation (see text). The last column reports the Kendall’s τ and Spearman’s ρ rank correlations of with the majority ranking of similarity to the ground truth (see text).