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. Author manuscript; available in PMC: 2021 Apr 7.
Published in final edited form as: Stat Anal Data Min. 2021 Feb 5;14(2):144–167. doi: 10.1002/sam.11498

FIGURE 1.

FIGURE 1

V-shaped two cluster simulation illustrating the basic concept behind sidification and sidClustering. Data are displayed as points on the figures and are colored black and red to indicate cluster membership (observe how points lie along a V-shape). Top right panel shows coplot of original features (X1, X2)T against SID interaction Z = X1 ★ X2. Regions labeled A–E in the coplot are identified by rectangles in the left scatter plot. In the bottom panel, the coplot is displayed in terms of the SID main effects (Y1, Y2)