arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1211.2671math.STstat.TH
收藏

主成分分析一致性的一般框架

A General Framework For Consistency of Principal Component Analysis

Dan Shen, Haipeng Shen, J. S. Marron

摘要:

提出了一种研究主成分分析(PCA)相合性的一般渐近框架.我们的框架工作包括几个以前研究的领域的渐近作为特殊情况,并允许一个调查有趣的连接和过渡之间的各个领域。更重要的是,它使我们能够研究以前没有考虑过的渐近场景,并获得新的见解PCA的一致性,子空间一致性和强不一致区域以及它们之间的边界。我们还建立了相应的收敛速度内的每个区域。在一般尖峰协方差模型下,维度(或变量的数量)阻碍了PCA的一致性,而样本量和尖峰信息(总体特征值的相对大小)促进了PCA的一致性。我们的框架很好地说明了这三种类型的信息在维度,样本量和尖峰大小方面的关系,并严格描述了它们的关系如何影响PCA一致性。

英文摘要:

A general asymptotic framework is developed for studying consis- tency properties of principal component analysis (PCA). Our frame- work includes several previously studied domains of asymptotics as special cases and allows one to investigate interesting connections and transitions among the various domains. More importantly, it enables us to investigate asymptotic scenarios that have not been considered before, and gain new insights into the consistency, subspace consistency and strong inconsistency regions of PCA and the boundaries among them. We also establish the corresponding convergence rate within each region. Under general spike covariance models, the dimension (or the number of variables) discourages the consistency of PCA, while the sample size and spike information (the relative size of the population eigenvalues) encourages PCA consistency. Our framework nicely illustrates the relationship among these three types of information in terms of dimension, sample size and spike size, and rigorously characterizes how their relationships affect PCA consistency.

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。

↑