A knowledge-light approach to regression using case-based reasoning

  • Authors:
  • Neil McDonnell;Pádraig Cunningham

  • Affiliations:
  • Department of Computer Science, Trinity College Dublin, Ireland;Department of Computer Science, Trinity College Dublin, Ireland

  • Venue:
  • ECCBR'06 Proceedings of the 8th European conference on Advances in Case-Based Reasoning
  • Year:
  • 2006

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Abstract

Most CBR systems in operation today are ‘retrieval-only' in that they do not adapt the solutions of retrieved cases. Adaptation is, in general, a difficult problem that often requires the acquisition and maintenance of a large body of explicit domain knowledge. For certain machine-learning tasks, however, adaptation can be performed successfully using only knowledge contained within the case base itself. One such task is regression (i.e. predicting the value of a numeric variable). This paper presents a knowledge-light regression algorithm in which the knowledge required to solve a query is generated from the differences between pairs of stored cases. Experiments show that this technique performs well relative to standard algorithms on a range of datasets.