Similarity and dissimilarity measures for mixed feature-type symbolic data

Abstract

This paper presents some preliminary results for the similarity and dissimilarity measures based on the Cartesian System Model (CSM) that is a mathematical model to manipulate mixed feature-type symbolic data. We define the notion of concept size for the description of each object in the feature space. By extending the notion to the concept sizes of the Cartesian join and the Cartesian meet of the descriptions for objects, we can obtain various similarity and dissimilarity measures. We present especially asymmetric and symmetric similarity measures useful for pattern recognition problems.