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Outlier detection for high dimensional data

Aggarwal, Charu C., Yu, Philip S.·2001·Proceedings of the 2001 ACM SIGMOD international conference on Management of data

Abstract

The outlier detection problem has important applications in the field of fraud detection, network robustness analysis, and intrusion detection. Most such applications are high dimensional domains in which the data can contain hundreds of dimensions. Many recent algorithms use concepts of proximity in order to find outliers based on their relationship to the rest of the data. However, in high dimensional space, the data is sparse and the notion of proximity fails to retain its meaningfulness. In fact, the sparsity of high dimensional data implies that every point is an almost equally good outlier from the perspective of proximity-based definitions. Consequently, for high dimensional data, the notion of finding meaningful outliers becomes substantially more complex and non-obvious. In this paper, we discuss new techniques for outlier detection which find the outliers by studying the behavior of projections from the data set.

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Metadata

Authors
Aggarwal, C. C., & Yu, P. S.
Venue
Proceedings of the 2001 ACM SIGMOD international conference on Management of data
Publisher
ACM
Published
2001-05
Pages
37-46
ISSN
0730-8078 (ISSN-L)
OpenAlex
W2061122559
Cited by
1,029
References
5
FWCI
13.18
Type
conference paper
Language
en
Open access
closed

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