Example of control points selection through Regularized Orthogonal Least Squares (ROLS) in a Mammals data set (20,000 instances and 47 dimensions). This data set contains four well-defined clusters, indicated by the different colors in the projection. Figures on the bottom present only the control points (150 randomly selected points on the left and 15 points selected through ROLS on the right) used to produce the projection, depicted on the top.
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