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arXiv 1402.3480stat.ME
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无限维空间中的空间分布以及相关的分位数和深度

The spatial distribution in infinite dimensional spaces and related quantiles and depths

Anirvan Chakraborty, Probal Chaudhuri

摘要:

空间分布已被广泛用于开发各种有限维多元数据的非参数程序。本文研究了无限维Banach空间中数据的空间分布概念。在这种空间中遇到许多技术困难,主要是由于封闭单位球的非紧性。在这项工作中,我们证明了一些Glivenko-Cantelli和Donsker型结果的经验空间分布过程在无限维空间。在这样的空间中的空间分位数可以通过反转空间分布函数来获得。得到了无限维空间中样本空间分位数的Bahadur型渐近线性表示及其弱收敛结果。对函数空间中的几种标准概率分布,研究了样本空间中值相对于样本均值的渐近有效性。空间分布可以用来定义无限维Banach空间中的空间深度,并研究了无限维Banach空间中经验空间深度的渐近性质.我们还展示了空间分位数和空间深度使用一些真实的和模拟的功能数据。

英文摘要:

The spatial distribution has been widely used to develop various nonparametric procedures for finite dimensional multivariate data. In this paper, we investigate the concept of spatial distribution for data in infinite dimensional Banach spaces. Many technical difficulties are encountered in such spaces that are primarily due to the noncompactness of the closed unit ball. In this work, we prove some Glivenko-Cantelli and Donsker-type results for the empirical spatial distribution process in infinite dimensional spaces. The spatial quantiles in such spaces can be obtained by inverting the spatial distribution function. A Bahadur-type asymptotic linear representation and the associated weak convergence results for the sample spatial quantiles in infinite dimensional spaces are derived. A study of the asymptotic efficiency of the sample spatial median relative to the sample mean is carried out for some standard probability distributions in function spaces. The spatial distribution can be used to define the spatial depth in infinite dimensional Banach spaces, and we study the asymptotic properties of the empirical spatial depth in such spaces. We also demonstrate the spatial quantiles and the spatial depth using some real and simulated functional data.

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