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. 2018 May 31;13(5):e0198245. doi: 10.1371/journal.pone.0198245

Table 1. Interpretation of the silhouette values for partitioning methods.

Silhouette coefficient Proposed interpretation
0.71–1.00 A strong cluster has been found
0.51–0.70 A reasonable cluster has been found
0.26–0.50 The cluster is weak and could be artificial
≤ 0.25 No substantial cluster has been found