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arXiv 1807.01422stat.MLcs.LG
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高维数据的特征选择对角判别分析

Diagonal Discriminant Analysis with Feature Selection for High Dimensional Data

University of Sydney(悉尼大学);The University of Melbourne(墨尔本大学)

Sarah Elizabeth Romanes, John Thomas Ormerod, Jean YH Yang

摘要:

我们介绍了一种新的方法进行高维判别分析,我们称之为multiDA。我们实现这一点,通过构建一个混合模型,无缝集成了多类对角判别分析模型和特征选择组件。我们的特征选择组件自然简化为权重,权重是似然比统计的简单函数,允许与传统的假设检验方法进行自然比较。我们提供启发式的参数,建议我们的算法的特征选择方面的理想的渐近性质。我们比较了我们的方法与其他几种方法,在预测精度,所选功能的可解释性和算法运行时间方面显示出显着的改进。我们通过在公开的高维数据集上显示出强大的分类性能以及通过多个模拟研究来证明我们模型的这些优势。我们提供了一个R包来实现我们的方法。

英文摘要:

We introduce a new method of performing high dimensional discriminant analysis, which we call multiDA. We achieve this by constructing a hybrid model that seamlessly integrates a multiclass diagonal discriminant analysis model and feature selection components. Our feature selection component naturally simplifies to weights which are simple functions of likelihood ratio statistics allowing natural comparisons with traditional hypothesis testing methods. We provide heuristic arguments suggesting desirable asymptotic properties of our algorithm with regards to feature selection. We compare our method with several other approaches, showing marked improvements in regard to prediction accuracy, interpretability of chosen features, and algorithm run time. We demonstrate such strengths of our model by showing strong classification performance on publicly available high dimensional datasets, as well as through multiple simulation studies. We make an R package available implementing our approach.

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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