Robust classification with categorical variables

Abstract

The forward search provides a powerful and computationally simple approach for the robust analysis of multivariate data. In this paper we suggest a new forward search algorithm for clustering multivariate categorical observations. Classification based on categorical information poses a number of challenging issues that are addressed by our algorithm. These include selection of the number of groups, identification of outliers and stability of the suggested solution. The performance of the algorithm is shown with both simulated and real examples.

Locations

• CiteSeer X (The Pennsylvania State University) - View - PDF