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arXiv 2008.09885stat.ME
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基于积分投影的函数线性模型的拟合优度检验

Goodness-of-fit tests for functional linear models based on integrated projections

Eduardo García-Portugués, Javier Álvarez-Liébana, Gonzalo Álvarez-Pérez, Wenceslao González-Manteiga

摘要:

函数线性模型是评价函数或标量性质的两个随机变量之间关系的最基本工具之一。这一贡献提出了一个良好的拟合测试功能线性模型的功能响应,巧妙地适应功能/标量响应/预测。特别是,新的拟合优度测试扩展了以前的标量响应的建议。该检验统计量基于方便的正则化估计量,易于计算,并通过有效的自举回归进行校准。一个图形化的诊断工具,从模型的偏差可视化,介绍和说明了一个新的数据应用程序。R包goffda实现了所提出的方法,并允许数据应用的再现性。

英文摘要:

Functional linear models are one of the most fundamental tools to assess the relation between two random variables of a functional or scalar nature. This contribution proposes a goodness-of-fit test for the functional linear model with functional response that neatly adapts to functional/scalar responses/predictors. In particular, the new goodness-of-fit test extends a previous proposal for scalar response. The test statistic is based on a convenient regularized estimator, is easy to compute, and is calibrated through an efficient bootstrap resampling. A graphical diagnostic tool, useful to visualize the deviations from the model, is introduced and illustrated with a novel data application. The R package goffda implements the proposed methods and allows for the reproducibility of the data application.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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