Approximation to expected support of frequent itemsets in mining probabilistic sets of uncertain data
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Date
2015
Authors
Cuzzocrea, Alfredo
Leung, Carson K.
MacKinnon, Richard Kyle
Journal Title
Journal ISSN
Volume Title
Publisher
Elsevier
Abstract
Knowledge discovery and data mining generally discovers implicit, previously unknown, and useful knowledge from data. As one of the popular knowledge discovery and data mining tasks, frequent itemset mining, in particular, discovers knowledge in the form of sets of frequently co-occurring items, events, or objects. On the one hand, in many real-life applications, users mine frequent patterns from traditional databases of precise data, in which users know certainly the presence of items in transactions. On the other hand, in many other real-life applications, users mine frequent itemsets from probabilistic sets of uncertain data, in which users are uncertain about the likelihood of the presence of items in transactions. Each item in these probabilistic sets of uncertain data is often associated with an existential probability expressing the likelihood of its presence in that transaction. To mine frequent itemsets from these probabilistic datasets, many existing algorithms capture lots of information to compute expected support. To reduce the amount of space required, algorithms capture some but not all information in computing or approximating expected support. The tradeoff is that the upper bounds to expected support may not be tight. In this paper, we examine several upper bounds and recommend to the user which ones consume less space while providing good approximation to expected support of frequent itemsets in mining probabilistic sets of uncertain data.
Description
A. Cuzzocrea, C.K. Leung, R.K. MacKinnon. Approximation to expected support of frequent itemsets in mining probabilistic sets of uncertain data. Procedia Computer Science, 60 (2015), pp. 613-622. This is an open access article under the CC BY-NC-ND license
(http://creativecommons.org/licenses/by-nc-nd/4.0/).
Keywords
knowledge discovery and data mining, expected support, frequent patterns, uncertain data, upper bounds
Citation
A. Cuzzocrea, C.K. Leung, R.K. MacKinnon. Approximation to expected support of frequent itemsets in mining probabilistic sets of uncertain data. Procedia Computer Science, 60 (2015), pp. 613-622