Estimating Joint Probabilities from Marginal Ones

  • Authors:
  • Tao Li;Shenghuo Zhu;Mitsunori Ogihara;Yinhe Cheng

  • Affiliations:
  • -;-;-;-

  • Venue:
  • DaWaK 2000 Proceedings of the 4th International Conference on Data Warehousing and Knowledge Discovery
  • Year:
  • 2002

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Abstract

Estimating joint probabilities plays an important role in many data mining and machine learning tasks. In this paper we introduce two methods, minAB and prodAB, to estimate joint probabilities. Both methods are based on a light-weight structure, partition support. The core idea is to maintain the partition support of itemsets over logically disjoint partitions and then use it to estimate joint probabilities of item-sets of higher cardinalitiess. We present extensive mathematical analyses on both methods and compare their performances on synthetic datasets. We also demonstrate a case study of using the estimation methods in Apriori algorithm for fast association mining. Moreover, we explore the usefulness of the estimation methods in other mining/learning tasks. Experimental results show the effectiveness of the estimation methods.