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arXiv 2007.00292math.STstat.TH
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随机对象的Fréchet充分降维

Fréchet Sufficient Dimension Reduction for Random Objects

Chao Ying, Zhou Yu

摘要:

本文考虑响应为度量空间中复随机对象和高维欧氏预测的Fréchet充分降维问题.我们提出了一种新的方法称为加权逆回归集成方法的线性Fréchet充分降维。该方法被进一步推广为再生核希尔伯特空间上定义的一种新的非线性Fréchet充分降维算子。我们通过渐近分析为新方法提供了理论保证。密集的模拟研究验证了我们的建议的性能。我们将我们的方法应用于分析手写数字数据,以展示其在实际应用中的用途。

英文摘要:

We in this paper consider Fréchet sufficient dimension reduction with responses being complex random objects in a metric space and high dimension Euclidean predictors. We propose a novel approach called weighted inverse regression ensemble method for linear Fréchet sufficient dimension reduction. The method is further generalized as a new operator defined on reproducing kernel Hilbert spaces for nonlinear Fréchet sufficient dimension reduction. We provide theoretical guarantees for the new method via asymptotic analysis. Intensive simulation studies verify the performance of our proposals. And we apply our methods to analyze the handwritten digits data to demonstrate its use in real applications.

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