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arXiv 2112.09784stat.ME
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部分观测函数数据的函数线性回归

Functional Linear Regression for Partially Observed Functional Data

Yafei Wang, Tingyu Lai, Bei Jiang, Linglong Kong, Zhongzhan Zhang

摘要:

在函数线性回归模型中,人们提出并研究了许多方法来估计斜率函数,同时在整个区域内观察函数预测。然而,工作的功能线性回归模型与部分观察到的轨迹受到较少的关注。在本文中,为了填补文献空白,我们考虑的情况下,个别功能预测可能只观察到的域的一部分。根据函数预测器中是否存在测量误差,提出了两种方法,一种是基于轨迹观测部分的线性泛函,另一种是使用条件主成分得分。我们建立了这两种方法的渐近性质。有限样本仿真进行验证其性能。分析了阿尔茨海默病神经影像学倡议(ADNI)研究的弥散张量成像(DTI)数据。

英文摘要:

In the functional linear regression model, many methods have been proposed and studied to estimate the slope function while the functional predictor was observed in the entire domain. However, works on functional linear regression models with partially observed trajectories have received less attention. In this paper, to fill the literature gap we consider the scenario where individual functional predictor may be observed only on part of the domain. Depending on whether measurement error is presented in functional predictors, two methods are developed, one is based on linear functionals of the observed part of the trajectory and the other one uses conditional principal component scores. We establish the asymptotic properties of the two proposed methods. Finite sample simulations are conducted to verify their performance. Diffusion tensor imaging (DTI) data from Alzheimer's Disease Neuroimaging Initiative (ADNI) study is analyzed.

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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