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arXiv 1402.6806math.STstat.TH
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基于稳健低秩数据矩阵逼近的统计推断

Statistical inference based on robust low-rank data matrix approximation

Xingdong Feng, Xuming He

摘要:

奇异值分解被广泛用于用低秩矩阵逼近数据矩阵。Feng和He [Ann. Appl. Stat. 3(2009)1634-1654]基于奇异值分解开发了对数据矩阵的平均结构的维度的测试。然而,第一奇异值和向量可以由少量的离群测量值驱动。在本文中,我们考虑了一个强大的替代方案,缓和低秩近似离群值的影响。在随机行效应的假设下,我们给出了鲁棒低秩逼近的渐近表示。这些表示可用于检验低秩近似的充分性。我们使用寡核苷酸基因微阵列数据,以证明如何强大的奇异值分解相比,其传统的同行。实例表明,稳健的方法往往导致更有意义的评估的基因强度数据矩阵的维数。

英文摘要:

The singular value decomposition is widely used to approximate data matrices with lower rank matrices. Feng and He [Ann. Appl. Stat. 3 (2009) 1634-1654] developed tests on dimensionality of the mean structure of a data matrix based on the singular value decomposition. However, the first singular values and vectors can be driven by a small number of outlying measurements. In this paper, we consider a robust alternative that moderates the effect of outliers in low-rank approximations. Under the assumption of random row effects, we provide the asymptotic representations of the robust low-rank approximation. These representations may be used in testing the adequacy of a low-rank approximation. We use oligonucleotide gene microarray data to demonstrate how robust singular value decomposition compares with the its traditional counterparts. Examples show that the robust methods often lead to a more meaningful assessment of the dimensionality of gene intensity data matrices.

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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