Decision and classification problems using Mahalanobis statistical distance

We present a method that uses Mahalanobis distance to study some decision and classification problems. Four examples are used to show the diversity of possible applications of our method. Based on two simulated sets of data, we have calculated the corresponding Mahalanobis distances and their sum and differences Holodiagrams. These diagrams are valuable visualization tools for studying decision and classification problems in the proposed applications.