Polynomial algorithms for nested univariate clustering

  • Authors:
  • Pierre Hansen;Brigitte Jaumard;Bruno Simeone

  • Affiliations:
  • GERAD and École des Hautes Études Commerciales, Ecole Polytechnique Montréal, 5255 Ave. Decelles Montreal, Quebec, Canada;GERAD and École Polytechnique de Montréal, 5255 Ave. Decelles Montreal, Quebec, Canada;Department of Statistics, University "La Sapienza", Rome, Italy

  • Venue:
  • Discrete Mathematics
  • Year:
  • 2002

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Abstract

Clique partitioning in Euclidean space Rn consists in finding a partition of a given set of N points into M clusters in order to minimize the sum of within-cluster interpoint distances. For n = 1 clusters need not consist of consecutive points on a line but have a nestedness property. Exploiting this property, an O(N5M2) dynamic programming algorithm is proposed. A θ(N) algorithm is also given for the case M = 2.