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. 2014 Aug 27;4:6207. doi: 10.1038/srep06207

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The four columns from left to right are for (1) a randomly generated unimodal dataset, (2) a 2-way pull-apart dataset with degree of pull-apart a = 0.08, (3) a 3-way pull-apart dataset with a = 0.12, and (4) a 4-way pull-apart dataset with a = 0.12. The first row (a1–a4): CDF plots from the consensus matrices. CDF curves for K = 2–6 are shown in black, red, green, blue and cyan, respectively. The second row (b1–b4): Δ(K) plots across K = 2–6. An elbow occurs at K = 4 in all plots suggesting an optimal K of 4. The third row (c1–c4): GAP plots across K = 2–6. In all four plots the optimal K value according to the original interpretation is 3. The fourth row (d1–d4): CLEST plots across K = 2–6. The decision criterion involving d^k suggest an optimal K of 1, 2, 3, and 5 in these four cases, respectively.