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A Smoothed Monotonic Regression via L2 Regularization
Linköping University, Department of Computer and Information Science, Statistics. Linköping University, Faculty of Arts and Sciences.
Linköping University, Department of Mathematics, Optimization . Linköping University, Faculty of Science & Engineering.ORCID iD: 0000-0003-1836-4200
2016 (English)Report (Other academic)
Abstract [en]

Monotonic Regression (MR) is a standard method for extracting a monotone function from non-monotonic data, and it is used in many applications. However, a known drawback of this method is that its fitted response is a piecewise constant function, while practical response functions are often required to be continuous. The method proposed in this paper achieves monotonicity and smoothness of the regression by introducing an L2 regularization term, and it is shown that the complexity of this method is O(n2). In addition, our simulations demonstrate that the proposed method normally has higher predictive power than some commonly used alternative methods, such as monotonic kernel smoothers. In contrast to these methods, our approach is probabilistically motivated and has connections to Bayesian modeling.

Place, publisher, year, edition, pages
Linköping: Linköping University Electronic Press, 2016. , 17 p.
Series
LiTH-MAT-R, ISSN 0348-2960 ; 2016:01
Keyword [en]
Monotonic regression, Kernel smoothing, Penalized regression, Bayesian modeling
National Category
Probability Theory and Statistics Computational Mathematics
Identifiers
URN: urn:nbn:se:liu:diva-125398ISRN: LiTH-MAT-R--2016/01--SELibris ID: 19704392OAI: oai:DiVA.org:liu-125398DiVA: diva2:905380
Available from: 2016-02-22 Created: 2016-02-22 Last updated: 2016-09-26Bibliographically approved

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Smoothed Monotonic Regression via L2 Regularization(349 kB)273 downloads
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Sysoev, OlegBurdakov, Oleg

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CiteExportLink to record
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  • apa
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