Clover plot: Versatile visualization in nonparametric classification

Abstract

A versatile visualization tool that aggregates several classification techniques is proposed and studied. In the clover plot we combine four complementary classifiers-the depth-depth plot, the bagdistance plot, an approach based on the illumination, and the classical diagnostic plot based on Mahalanobis distances.

An interactive R implementation of this tool, including several model examples of its use, is freely available online.

Keywords

• bagdistance
• classification
• dimension reduction
• halfspace depth
• illumination
• Mahalanobis distance
• statistical depth function
• visualization