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Tutz, Gerhard and Gertheiss, Jan (20. December 2007): Feature Extraction in Signal Regression: A Boosting Technique for Functional Data Regression. Department of Statistics: Technical Reports, No.11 Journal of Computational and Graphical Statistics, 19
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Abstract

Main objectives of feature extraction in signal regression are the improvement of accuracy of prediction on future data and identification of relevant parts of the signal. A feature extraction procedure is proposed that uses boosting techniques to select the relevant parts of the signal. The proposed blockwise boosting procedure simultaneously selects intervals in the signal’s domain and estimates the effect on the response. The blocks that are defined explicitly use the underlying metric of the signal. It is demonstrated in simulation studies and for real-world data that the proposed approach competes well with procedures like PLS, P-spline signal regression and functional data regression. The paper is a preprint of an article published in the Journal of Computational and Graphical Statistics. Please use the journal version for citation.