This paper introduces a nonparametric scan method for multivariate data indexed in space. Contrary to many other scan methods, it does not rely on a generalized likelihood ratio but is completely distribution-free as it is based on so-called multivariate ranks. This spatial scan test seems to be more reliable for analysing data that are not Gaussian, such as environmental measurements. We apply this method to a dataset recording the levels of metallic pollutants for two areas in the North of France. (C) 2018 Elsevier B.V. All rights reserved.
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Univ Lille, CHU Lille, METRICS Evaluat Technol Sante & Prat Med ULR 2694, F-59000 Lille, France
INRIA Lille Nord Europe, MODAL Team, Lille, FranceUniv Lille, CHU Lille, METRICS Evaluat Technol Sante & Prat Med ULR 2694, F-59000 Lille, France
Frevent, Camille
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Ahmed, Mohamed-Salem
Dabo-Niang, Sophie
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INRIA Lille Nord Europe, MODAL Team, Lille, France
Univ Lille, CNRS, Lab Paul Painleve UMR 8524, F-59000 Lille, FranceUniv Lille, CHU Lille, METRICS Evaluat Technol Sante & Prat Med ULR 2694, F-59000 Lille, France