Detecting Spatial Clusters via a Mixture of Dirichlet Processes

Meredith A. Ray, Jian Kang and Hongmei Zhang

Journal of Probability and Statistics, 2018, vol. 2018, 1-12

Abstract:

We proposed an approach that has the ability to detect spatial clusters with skewed or irregular distributions. A mixture of Dirichlet processes (DP) was used to describe spatial distribution patterns. The effects of different batches of data collection efforts were also modeled with a Dirichlet process. To cluster spatial foci, a birth-death process was applied due to its advantage of easier jumping between different numbers of clusters. Inferences of parameters including clustering were drawn under a Bayesian framework. Simulations were used to demonstrate and assess the method. We applied the method to an fMRI meta-analysis dataset to identify clusters of foci corresponding to different emotions.

Date: 2018
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Persistent link: https://EconPapers.repec.org/RePEc:hin:jnljps:3506794

DOI: 10.1155/2018/3506794

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