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Table 2 Validity indices used to estimate the optimum number of data clusters

From: Profile analysis and prediction of tissue-specific CpG island methylation classes

CGI methylation data
Hierarchical clusters ICT K-means clusters ADSM
9 2.35 3 0.755
16 2.3 4 0.678
35 2.25 5 0.605
38 2.2 6 0.509
41 2.15 7 0.497
44 2.1 8 0.490
48 2.05 9 0.472
50 2 10 0.485
CGI attribute data
Hierarchical clusters ICT K-means clusters ADSM
1 2.7 3 0.221
8 2.65 4 0.233
9 2.6 5 0.184
9 2.55 6 0.177
9 2.5 7 0.169
16 2.45 8 0.145
24 2.4 9 0.134
31 2.35 10 -0.348