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arXiv 1809.03285math.NAcs.NA
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大型矩阵的SVD更新方法及其应用

SVD update methods for large matrices and applications

Universidad de Zaragoza(萨拉戈萨大学);Universität Passau(帕绍大学)

Juan Manuel Peña, Tomas Sauer

AI总结:

本文提出一种高效计算扩展矩阵SVD的方法,用于主成分分析和矩阵核空间基底提取,适用于高维数据处理。

摘要:

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英文摘要:

We consider the problem of updating the SVD when augmenting a "tall thin" matrix, i.e., a rectangular matrix $A \in \RR^{m \times n}$ with $m \gg n$. Supposing that an SVD of $A$ is already known, and given a matrix $B \in \RR^{m \times n'}$, we derive an efficient method to compute and efficiently store the SVD of the augmented matrix $[ A B ] \in \RR^{m \times (n+n')}$. This is an important tool for two types of applications: in the context of principal component analysis, the dominant left singular vectors provided by this decomposition form an orthonormal basis for the best linear subspace of a given dimension, while from the right singular vectors one can extract an orthonormal basis of the kernel of the matrix. We also describe two concrete applications of these concepts which motivated the development of our method and to which it is very well adapted.

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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