Penalized nonparametric scalar-on-function regression via principal coordinates.
Penalized nonparametric scalar-on-function regression via principal coordinates.
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DOI:
10.1080/10618600.2016.1217227
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发表时间:
2017
期刊:
影响因子:
--
通讯作者:
Hua WY
中科院分区:
文献类型:
--
作者:
Reiss PT;Miller DL;Wu PS;Hua WY
A number of classical approaches to nonparametric regression have recently been extended to the case of functional predictors. This paper introduces a new method of this type, which extends intermediate-rank penalized smoothing to scalar-on-function regression. In the proposed method, which we call principal coordinate ridge regression, one regresses the response on leading principal coordinates defined by a relevant distance among the functional predictors, while applying a ridge penalty. Our publicly available implementation, based on generalized additive modeling software, allows for fast optimal tuning parameter selection and for extensions to multiple functional predictors, exponential family-valued responses, and mixed-effects models. In an application to signature verification data, principal coordinate ridge regression, with dynamic time warping distance used to define the principal coordinates, is shown to outperform a functional generalized linear model.
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