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arXiv 1507.08029math.OC
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稀疏主成分分析问题:最优性条件及算法

The Sparse Principal Component Analysis Problem: Optimality Conditions and Algorithms

Amir Beck, Yakov Vaisbourd

摘要:

稀疏主成分分析解决了在给定的数据集中找到具有稀疏系数向量的变量的线性组合的问题,该稀疏系数向量使数据的可变性最大化。该模型增强了解释主成分的能力,并且适用于包括遗传学和金融在内的各种领域,仅举几例。我们提出了一个必要的坐标明智的基础最优性条件,并显示其优越性,在文献中常用的基于平稳性的条件,这是许多算法的基础上设计来解决这个问题。我们设计的算法,是基于新的最优性条件,并提供数值实验,支持我们的断言,算法,保证收敛到更强的最优性条件,比算法收敛到满足较弱的最优性条件。

英文摘要:

Sparse principal component analysis addresses the problem of finding a linear combination of the variables in a given data set with a sparse coefficients vector that maximizes the variability of the data. This model enhances the ability to interpret the principal components, and is applicable in a wide variety of fields including genetics and finance, just to name a few. We suggest a necessary coordinate-wise-based optimality condition, and show its superiority over the stationarity-based condition that is commonly used in the literature, and which is the basis for many of the algorithms designed to solve the problem. We devise algorithms that are based on the new optimality condition, and provide numerical experiments that support our assertion that algorithms, which are guaranteed to converge to stronger optimality conditions, perform better than algorithms that converge to points satisfying weaker optimality conditions.

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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