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Mixture of segmentation for heterogeneous functional data
Vincent Brault, Émilie Devijver, Charlotte Laclau · 2023-03-20 · via stat.ML updates on arXiv.org

In this paper we consider functional data with heterogeneity in time and in population. We propose a mixture model with segmentation of time to represent this heterogeneity while keeping the functional structure. Maximum likelihood estimator is considered, proved to be identifiable and consistent. In practice, an EM algorithm is used, combined with dynamic programming for the maximization step, to approximate the maximum likelihood estimator. The method is illustrated on a simulated dataset, and used on a real dataset of electricity consumption.

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