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arXiv · 1709.06421

Pruning and Nonparametric Multiple Change Point Detection

Wenyu Zhang·Nicholas James·David Matteson
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Abstract

Change point analysis is a statistical tool to identify homogeneity within time series data. We propose a pruning approach for approximate nonparametric estimation of multiple change points. This general purpose change point detection procedure `cp3o' applies a pruning routine within a dynamic program to greatly reduce the search space and computational costs. Existing goodness-of-fit change point objectives can immediately be utilized within the framework. We further propose novel change point algorithms by applying cp3o to two popular nonparametric goodness of fit measures: `e-cp3o' uses E-statistics, and `ks-cp3o' uses Kolmogorov-Smirnov statistics. Simulation studies highlight the performance of these algorithms in comparison with parametric and other nonparametric change point methods. Finally, we illustrate these approaches with climatological and financial applications.

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Wenyu Zhang, Nicholas James, David Matteson. 2017-09-16. Pruning and Nonparametric Multiple Change Point Detection. https://arxiv.org/abs/1709.06421

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