A Discretization Process in Accordance with a Qualitative Ordered Output

  • Authors:
  • Francisco J. Ruiz;Cecilio Angulo;Núria Agell;Xari Rovira;Mónica Sánchez;Francesc Prats

  • Affiliations:
  • ESAII, U. Politècnica de Catalunya, A. Victor Balaguer, s/n, 08800 Vilanova G.;ESAII, U. Politècnica de Catalunya, A. Victor Balaguer, s/n, 08800 Vilanova G.;ESADE, U. Ramon Llull, Av. Pedralbes, 60-62, 08034 Barcelona;ESADE, U. Ramon Llull, Av. Pedralbes, 60-62, 08034 Barcelona;MA2, U. Politècnica de Catalunya, C. Jordi Girona 1-3, 08034 Barcelona, {nuria.agell, xari.rovira}@esade.edu, {monica.sanchez, francesc.prats, francisco.javier.ruiz}@upc.edu;MA2, U. Politècnica de Catalunya, C. Jordi Girona 1-3, 08034 Barcelona, {nuria.agell, xari.rovira}@esade.edu, {monica.sanchez, francesc.prats, francisco.javier.ruiz}@upc.edu

  • Venue:
  • Proceedings of the 2005 conference on Artificial Intelligence Research and Development
  • Year:
  • 2005

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Abstract

This paper lies within the domain of supervised discretization methods. The methodology aims at identifying relevant interactions between input and output variables. A new supervised discretization algorithm that takes into account the qualitative ordinal structure of the output variable is proposed. Most existing supervised discretization methods are designed for pattern recognition problems and do not take into account this ordinal structure. A qualitative distance is constructed over the discrete structure of absolute orders of magnitude spaces. The algorithm presented implements a maximization process of this distance. A simple example allows interpretation of the process of choosing landmarks.