Detecting Spatial Clusters via a Mixture of Dirichlet Processes
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.
Publication Title
Journal of Probability and Statistics
Recommended Citation
Ray, M., Kang, J., & Zhang, H. (2018). Detecting Spatial Clusters via a Mixture of Dirichlet Processes. Journal of Probability and Statistics, 2018 https://doi.org/10.1155/2018/3506794
