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arXiv 1503.03515stat.ME
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因子分析的双交叉验证

Bi-cross-validation for factor analysis

A. B. Owen, J. Wang

摘要:

因子分析已经有一个多世纪的历史了,但是为给定的数据集选择因子的数量仍然是个问题。碎石测试很流行,但很主观。最好的执行客观的方法建议的基础上模拟。我们介绍了一种基于双交叉验证的方法,使用随机持有的数据的子矩阵来选择因子的数量。我们发现它比并行分析(PA)和凯泽规则的领先方法更好。我们的性能标准是基于恢复的基本因素加载(信号)矩阵,而不是确定的因素的真实数量。像以前的比较,我们的工作是基于模拟。随机矩阵理论的最新进展提供了原则性的选择因素的数量时,噪声是同方差的,但不为异方差的情况下。我们选择的模拟是使用随机矩阵理论的指导设计的。特别是,我们包括因素太小,检测,因素大到足以检测,但不足以大到改善估计,两类因素大到足够有用。双向交叉验证的大部分优势来自于因子大到足以检测但太小而无法很好估计的情况。我们还发现,一种形式的早期停止正则化提高了信号矩阵的恢复。

英文摘要:

Factor analysis is over a century old, but it is still problematic to choose the number of factors for a given data set. The scree test is popular but subjective. The best performing objective methods are recommended on the basis of simulations. We introduce a method based on bi-cross-validation, using randomly held-out submatrices of the data to choose the number of factors. We find it performs better than the leading methods of parallel analysis (PA) and Kaiser's rule. Our performance criterion is based on recovery of the underlying factor-loading (signal) matrix rather than identifying the true number of factors. Like previous comparisons, our work is simulation based. Recent advances in random matrix theory provide principled choices for the number of factors when the noise is homoscedastic, but not for the heteroscedastic case. The simulations we choose are designed using guidance from random matrix theory. In particular, we include factors too small to detect, factors large enough to detect but not large enough to improve the estimate, and two classes of factors large enough to be useful. Much of the advantage of bi-cross-validation comes from cases with factors large enough to detect but too small to be well estimated. We also find that a form of early stopping regularization improves the recovery of the signal matrix.

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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