Varying Coefficient Model via Adaptive Spline Fitting
Varying Coefficient Model via Adaptive Spline Fitting
复制标题
通过自适应样条拟合改变系数模型
DOI:
10.1080/10618600.2023.2267616
复制
发表时间:
2023
影响因子:
2.4
通讯作者:
Liu, Jun S.
中科院分区:
文献类型:
--
作者:
Wang, Xufei;Jiang, Bo;Liu, Jun S.
The varying coefficient model is a potent dimension reduction tool for nonparametric modeling and has received extensive attention from researchers. Most existing methods for fitting this model use polynomial splines with equidistant knots and treat the number of knots as a hyperparameter. However, imposing equidistant knots tends to be overly rigid, and systematically determining the optimal number of knots is also challenging. In this article, we address these challenges by employing polynomial splines with adaptively selected and predictor-specific knots to fit the varying coefficients in the model. We propose an efficient dynamic programming algorithm to find the optimal solution. Numerical results demonstrate that our new method achieves significantly smaller mean squared errors for coefficient estimations compared to the equidistant spline fitting method. An implementation of our method in R is available at https://github.com/wangxf0106/vcmasf. Proofs of the theorems are provided in the online supplementary materials.
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影响因子:
4.9
作者:
Finley, Andrew O.;Banerjee, Sudipto
通讯作者:
Banerjee, Sudipto
影响因子:
1.5
作者:
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DOI:
10.1198/016214506000000735
发表时间:
2006-12-01
影响因子:
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作者:
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Zou, Hui
DOI:
10.1016/j.scitotenv.2020.144390
发表时间:
2021-04-01
期刊:
The Science of the total environment
影响因子:
--
作者:
Notari A
通讯作者:
Notari A
影响因子:
1.4
作者:
Wei F;Huang J;Li H
通讯作者:
Li H