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2016 | OriginalPaper | Buchkapitel

Consistent Model Combination of Lasso via Regularization Path

verfasst von : Mei Wang, Yingqi Sun, Erlong Yang, Kaoping Song

Erschienen in: Pattern Recognition

Verlag: Springer Singapore

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Abstract

It is well-known that model combination can improve prediction performance of regression model. We investigate the model combination of Lasso with regularization path in this paper. We first define the prediction risk of Lasso estimator, and prove that Lasso regularization path contains at least one prediction consistent estimator. Then we establish the prediction consistency for convex combination of Lasso estimators, which gives the mathematical justification for model combination of Lasso on regularization path. With the inherent piecewise linearity of Lasso regularization path, we construct the initial candidate model set, then select the models for combination with Occam’s Window method. Finally, we carry out the combination on the selected models using the Bayesian model averaging. Theoretical analysis and experimental results suggest the feasibility of the proposed method.

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Metadaten
Titel
Consistent Model Combination of Lasso via Regularization Path
verfasst von
Mei Wang
Yingqi Sun
Erlong Yang
Kaoping Song
Copyright-Jahr
2016
Verlag
Springer Singapore
DOI
https://doi.org/10.1007/978-981-10-3002-4_45

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