Table 2. The number of discontinuities detected in six data sets by hierarchical cluster analysis (HCA), Bayesian classification and regression tree (BCART), classification and regression tree (CART), and gap rarity index (GRI).

  


Data set METHOD
HCA BCART CART GRI
Boreal forest birds (n = 101) 8 8 7 8
South Carolina manufacturing firms
SIC 226 (n = 63)
6 6 6 8
Southwestern U.S. cities 1890 (n = 48) 3 4 4 4
Boreal forest mammals (n = 36) 5 5 5 4
Everglades mammals (n = 35) 5 5 6 5
Mediterranean mammals (n = 31) 4 4 5 4