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arXiv 0811.4167stat.MEstat.ML
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大p小n数据下的惩罚同成分回归

Penalized Orthogonal-Components Regression for Large p Small n Data

Dabao Zhang, Yanzhu Lin, Min Zhang

摘要:

我们提出了一个惩罚正交成分回归(POCRE)的大p小n数据。按顺序构建正交分量,以在标准化后最大化其与响应残差的相关性。一个新的惩罚框架,通过经验贝叶斯阈值实现,有效地识别每个组件的稀疏预测。POCRE是计算效率,由于其领先的稀疏主成分的顺序构造。此外,这种构造提供了其他属性,例如对高度相关的预测器进行分组,并允许共线或近似共线的预测器。POCRE可以通过多变量响应构造公共成分,从而建立大p小n数据的潜变量模型。

英文摘要:

We propose a penalized orthogonal-components regression (POCRE) for large p small n data. Orthogonal components are sequentially constructed to maximize, upon standardization, their correlation to the response residuals. A new penalization framework, implemented via empirical Bayes thresholding, is presented to effectively identify sparse predictors of each component. POCRE is computationally efficient owing to its sequential construction of leading sparse principal components. In addition, such construction offers other properties such as grouping highly correlated predictors and allowing for collinear or nearly collinear predictors. With multivariate responses, POCRE can construct common components and thus build up latent-variable models for large p small n data.

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