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High Dimensional Change Point Models for Two-Directional ...
[Submitted on 5 Jun 2026] · 2026-06-09 · via stat updates on arXiv.org

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Abstract:We develop methodology for recovery of change points for data observed on more than one temporal index where changes may occur simultaneous in both indices, where the spatial component may be high dimensional. The work is motivated by climate monitoring problems where long series of data are available, e.g., daily observations (index 1) over several years (index 2). Such data may be evolving over the annual time scale, along with dynamic seasonal changes in the shorter time scale. We model this as a high dimensional mean process observed on a two dimensional grid with change points. Asymptotic estimation and inference results are developed under a single change point setup, including rates of convergence of the proposed method as well the resulting limiting distributions. The method is extended to the case of multiple changes. Theoretical results are supported numerically with monte-carlo simulations. We implement our work on a large scale climate data for the Pacific Northwest region of the United States.

Submission history

From: Abhishek Kaul [view email]
[v1] Fri, 5 Jun 2026 19:53:40 UTC (749 KB)