A new statistical depth function with applications to multimodal data

W. Lok and Stephen Lee

Journal of Nonparametric Statistics, 2011, vol. 23, issue 3, 617-631

Abstract: We propose a new statistical depth function based on interpoint distances, which has the distinct property of respecting multimodality in data configurations. This property proves to be especially relevant to many inference problems including confidence region construction, classification, tests for equality of populations, p-value computation, etc. With specification of an appropriate interpoint distance, our depth function also applies to infinite-dimensional data. A number of examples are used to illustrate the diverse applicability of our proposed depth function in different problem settings, where the conventional centre-outward ordering depth functions are found to be inadequate.

Date: 2011
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DOI: 10.1080/10485252.2011.553953

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