AMI                     Adjusted Mutual Information
ARI                     Adjusted Rand Index
Chi2                    Chi-square statistics
compare_clustering      Measures of similarity between two
                        classification
entropy                 Entropy
Frobenius               Frobenius norm
MARI                    Modified Adjusted Rand Index
NID                     Normalized information distance (NID)
NMI                     Normalized mutual information (NMI)
NVI                     Normalized variation of information (NVI)
RI                      Rand Index
sort_pairs              Sort Pairs
