2012 TheLongandtheShortofItSummarisi

• (Tatti & Vreeken, 2012) ⇒ Nikolaj Tatti, and Jilles Vreeken. (2012). “The Long and the Short of It: Summarising Event Sequences with Serial Episodes.” In: Proceedings of the 18th ACM SIGKDD International Conference on Knowledge Discovery and Data Mining (KDD-2012). ISBN:978-1-4503-1462-6 doi:10.1145/2339530.2339606

Subject Headings:

Cited By

• http://scholar.google.com/scholar?q=%222012%22+The+Long+and+the+Short+of+It%3A+Summarising+Event+Sequences+with+Serial+Episodes
• http://dl.acm.org/citation.cfm?id=2339530.2339606&preflayout=flat#citedby

Quotes

Author Keywords

• Data mining; event sequence; pattern mining; pattern set mining; serial episodes

Abstract

An ideal outcome of pattern mining is a small set of informative patterns, containing no redundancy or noise, that identifies the key structure of the data at hand. Standard frequent pattern miners do not achieve this goal, as due to the pattern explosion typically very large numbers of highly redundant patterns are returned.

We pursue the ideal for sequential data, by employing a pattern set mining approach - an approach where, instead of ranking patterns individually, we consider results as a whole. Pattern set mining has been successfully applied to transactional data, but has been surprisingly understudied for sequential data.

In this paper, we employ the MDL principle to identify the set of sequential patterns that summarises the data best. In particular, we formalise how to encode sequential data using sets of serial episodes, and use the encoded length as a quality score. As search strategy, we propose two approaches: the first algorithm selects a good pattern set from a large candidate set, while the second is a parameter-free any-time algorithm that mines pattern sets directly from the data. Experimentation on synthetic and real data demonstrates we efficiently discover small sets of informative patterns.

References

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	Author	volume	Date Value	title	type	journal	titleUrl	doi	note	year
2012 TheLongandtheShortofItSummarisi	Nikolaj Tatti Jilles Vreeken			The Long and the Short of It: Summarising Event Sequences with Serial Episodes				10.1145/2339530.2339606		2012