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An adaptive minimum spanning tree test for detecting irregularly-shaped spatial clusters

Ruoyu Zhou, Lianjie Shu and Yan Su

Computational Statistics & Data Analysis, 2015, vol. 89, issue C, 134-146

Abstract: The clustering methodologies based on minimum spanning tree (MST) have been widely discussed due to their simplicity and efficiency in signaling irregular clusters. However, most of the MST-based clustering methods estimate the most likely cluster based on the maximum likelihood ratio from the resulting subtrees after the removal of edges of the MST. They can only estimate one cluster even if there are multiple clusters actually present over the study region. To overcome this limitation, we propose an adaptive MST (AMST) method to detect irregularly-shaped clusters. The basic idea is to first determine the best number of partition over the study region using a validity index and then to determine the significance of the candidate clusters. The comparison results with both the static and dynamic MST methods favor the proposed method.

Keywords: Minimum spanning tree; Spatial cluster detection; Arbitrary shape; Validity index (search for similar items in EconPapers)
Date: 2015
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Citations: View citations in EconPapers (2)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:csdana:v:89:y:2015:i:c:p:134-146

DOI: 10.1016/j.csda.2015.03.008

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