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. 2013 Dec 31;8(12):e83956. doi: 10.1371/journal.pone.0083956

Table 2. The optimal number of clusters for the three data-sets obtained by using consensus indices (CI).

Data-set CI # of clusters (Inline graphic) # Descriptors in each cluster
Inline graphic 0.942 5 Inline graphic, Inline graphic, Inline graphic, Inline graphic, Inline graphic
Inline graphic 0.9878 16 Inline graphic, Inline graphic, Inline graphic, Inline graphic, Inline graphic, Inline graphic, Inline graphic, Inline graphic, Inline graphic, Inline graphic, Inline graphic, Inline graphic, Inline graphic, Inline graphic, Inline graphic, Inline graphic
Inline graphic 1.00 7 Inline graphic, Inline graphic, Inline graphic, Inline graphic, Inline graphic, Inline graphic, Inline graphic

The optimal numbers of clusters (for three data-sets) for a clustering solution Inline graphic is represented by the set Inline graphic, where Inline graphic is the optimal number of clusters in the data.