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arXiv 2010.08673stat.ME
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高维典型相关分析的显著性检验

Significance testing for canonical correlation analysis in high dimensions

Ian W. McKeague, Xin Zhang

摘要:

我们考虑的问题,大型随机变量集之间的线性关系的存在下,典型相关分析的后选择推理方法的基础上的测试。挑战在于调整具有最大样本相关性的线性组合的变量子集的选择。为此,我们构建了一个稳定的一步估计的欧氏范数的典型相关最大化的变量子集的预先指定的基数。这个估计量是一致的,其目标参数和渐近正态提供的维度的变量不增长太快,样本量。我们还开发了一个贪婪的搜索算法,以准确地计算估计,导致一个计算上易于处理的综合测试的全球原假设,有没有任何子集的变量之间的线性关系具有预先指定的基数。此外,我们开发了一个置信区间的目标参数,考虑到变量的选择。

英文摘要:

We consider the problem of testing for the presence of linear relationships between large sets of random variables based on a post-selection inference approach to canonical correlation analysis. The challenge is to adjust for the selection of subsets of variables having linear combinations with maximal sample correlation. To this end, we construct a stabilized one-step estimator of the euclidean-norm of the canonical correlations maximized over subsets of variables of pre-specified cardinality. This estimator is shown to be consistent for its target parameter and asymptotically normal provided the dimensions of the variables do not grow too quickly with sample size. We also develop a greedy search algorithm to accurately compute the estimator, leading to a computationally tractable omnibus test for the global null hypothesis that there are no linear relationships between any subsets of variables having the pre-specified cardinality. Further, we develop a confidence interval for the target parameter that takes the variable selection into account.

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