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Journal of Zhejiang University SCIENCE A 2009 Vol.10 No.6 P.909~921

http://doi.org/10.1631/jzus.A0820140


Outlier detection by means of robust regression estimators for use in engineering science


Author(s):  Serif HEKIMOGLU, R. Cuneyt ERENOGLU, Jan KALINA

Affiliation(s):  Department of Geodesy and Photogrammetry Engineering, Yildiz Technical University, Istanbul 34349, Turkey; more

Corresponding email(s):   hekim@yildiz.edu.tr, ceren@yildiz.edu.tr

Key Words:  Linear regression, Outlier, Mean success rate (MSR), Leverage point, Least median of squares (LMS), Least trimmed squares (LTS)


Serif HEKIMOGLU, R. Cuneyt ERENOGLU, Jan KALINA. Outlier detection by means of robust regression estimators for use in engineering science[J]. Journal of Zhejiang University Science A, 2009, 10(6): 909~921.

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Abstract: 
This study compares the ability of different robust regression estimators to detect and classify outliers. Well-known estimators with high breakdown points were compared using simulated data. Mean success rates (MSR) were computed and used as comparison criteria. The results showed that the least median of squares (LMS) and least trimmed squares (LTS) were the most successful methods for data that included leverage points, masking and swamping effects or critical and concentrated outliers. We recommend using LMS and LTS as diagnostic tools to classify outliers, because they remain robust even when applied to models that are heavily contaminated or that have a complicated structure of outliers.

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article

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