Fast Discovery of Minimal Sets of Attributes Functionally Determining a Decision Attribute

  • Authors:
  • Marzena Kryszkiewicz;Piotr Lasek

  • Affiliations:
  • Institute of Computer Science, Warsaw University of Technology, Nowowiejska 15/19, 00-665 Warsaw, Poland;Institute of Computer Science, Warsaw University of Technology, Nowowiejska 15/19, 00-665 Warsaw, Poland

  • Venue:
  • RSEISP '07 Proceedings of the international conference on Rough Sets and Intelligent Systems Paradigms
  • Year:
  • 2007

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Abstract

In our paper, we offer an efficient Funalgorithm for discovering minimal sets of conditional attributes functionally determining a given dependent attribute, and in particular, for discovering Rough Sets certain, generalized decision, and membership distribution reducts. Funcan operate either on partitions or alternatively on stripped partitions that do not store singleton groups. It is capable of using functional dependencies occurring among conditional attributes for pruning candidate dependencies. The experimental results show that all variants of Funhave similar performance. They also prove that Funis much faster than the Rosetta toolkit's algorithms computing all reducts and faster than TANE, which is one of the most efficient algorithms computing all minimal functional dependencies.