Clustering preprocessing to improve time series forecasting

  • Authors:
  • Francisco Martínez-Álvarez

  • Affiliations:
  • Department of Computer Science, Pablo de Olavide University of Seville, Seville, Spain. E-mail: fmaralv@upo.es

  • Venue:
  • AI Communications
  • Year:
  • 2011

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Abstract

This work proposes a novel general-purpose forecasting algorithm. It first extracts patterns from time series using the information provided by certain clustering techniques, which are applied as a first step of the approach. Moreover, the occurrence of data with especially unexpected values (outliers) is also addressed in this work. To deal with these outliers, a new hybrid methodology has been proposed, by inserting and adapting an existing approach based on the discovery of frequent episodes in sequences in the general scheme of prediction.