Fig. 1From: Affine-transformation invariant clustering modelsThe scatter plots for XI,XII, and XIII of the unit square synthetic data from the left to the right. The most left panel is the original features which have four clusters at the vertices of the unit square with equal size 20; the middle panel is the features which are transformed by scaling each dimension differently, clusters 1 and 2 are grouped as well as clusters 3 and 4 are grouped; the right panel shows the transformed features are aligned as a straight lineBack to article page