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Average partition coefficient and partition entropy scores of NMF models of complexity K = (5,10,25,50,75,100) estimated using five-fold stability analysis. The left-hand panel plot uses the partition coefficient score, and the right-hand panel plot uses partition entropy score. Both the partition coefficient and the partition entropy suggest that smaller models result in more “crisp” clustering solutions; whereas, larger models result in more “fuzzy/admixed” clustering solutions
