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(A–C) SNN graphs constructed with k = 5 (A), 8 (B) and 10 (C) for a synthetic 2D dataset containing six perceptual clusters with high-, mid- and low- densities. Edge weights are not shown for clarity. (D–F) Performance of SNN-Cliq on three synthetic 2D datasets with distinct structures. Dataset are from (Veenman et al., 2002) (D), (Gionis et al., 2007) (E) and (Fu and Medico, 2007) (F). Data points grouped in the same cluster by the algorithm are shown in the same color
