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Distributed Estimation for Principal Component Analysis: An Enlarged Eigenspace Analysis

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  • Xi Chen
  • Jason D. Lee
  • He Li
  • Yun Yang

Abstract

The growing size of modern datasets brings many challenges to the existing statistical estimation approaches, which calls for new distributed methodologies. This article studies distributed estimation for a fundamental statistical machine learning problem, principal component analysis (PCA). Despite the massive literature on top eigenvector estimation, much less is presented for the top-L-dim (L > 1) eigenspace estimation, especially in a distributed manner. We propose a novel multi-round algorithm for constructing top-L-dim eigenspace for distributed data. Our algorithm takes advantage of shift-and-invert preconditioning and convex optimization. Our estimator is communication-efficient and achieves a fast convergence rate. In contrast to the existing divide-and-conquer algorithm, our approach has no restriction on the number of machines. Theoretically, the traditional Davis–Kahan theorem requires the explicit eigengap assumption to estimate the top-L-dim eigenspace. To abandon this eigengap assumption, we consider a new route in our analysis: instead of exactly identifying the top-L-dim eigenspace, we show that our estimator is able to cover the targeted top-L-dim population eigenspace. Our distributed algorithm can be applied to a wide range of statistical problems based on PCA, such as principal component regression and single index model. Finally, we provide simulation studies to demonstrate the performance of the proposed distributed estimator.

Suggested Citation

  • Xi Chen & Jason D. Lee & He Li & Yun Yang, 2022. "Distributed Estimation for Principal Component Analysis: An Enlarged Eigenspace Analysis," Journal of the American Statistical Association, Taylor & Francis Journals, vol. 117(540), pages 1775-1786, October.
  • Handle: RePEc:taf:jnlasa:v:117:y:2022:i:540:p:1775-1786
    DOI: 10.1080/01621459.2021.1886937
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    Cited by:

    1. Bao, Yajie & Ren, Haojie, 2023. "Semi-profiled distributed estimation for high-dimensional partially linear model," Computational Statistics & Data Analysis, Elsevier, vol. 188(C).

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