Structured functional additive regression in reproducing kernel Hilbert spaces.
Structured functional additive regression in reproducing kernel Hilbert spaces.
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DOI:
10.1111/rssb.12036
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发表时间:
2014-06-01
期刊:
影响因子:
--
通讯作者:
Zhang HH
中科院分区:
文献类型:
--
作者:
Zhu H;Yao F;Zhang HH
Functional additive models (FAMs) provide a flexible yet simple framework for regressions involving functional predictors. The utilization of data-driven basis in an additive rather than linear structure naturally extends the classical functional linear model. However, the critical issue of selecting nonlinear additive components has been less studied. In this work, we propose a new regularization framework for the structure estimation in the context of Reproducing Kernel Hilbert Spaces. The proposed approach takes advantage of the functional principal components which greatly facilitates the implementation and the theoretical analysis. The selection and estimation are achieved by penalized least squares using a penalty which encourages the sparse structure of the additive components. Theoretical properties such as the rate of convergence are investigated. The empirical performance is demonstrated through simulation studies and a real data application.
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