inscription
PORTAIL D'INFORMATION GÉOGRAPHIQUE

An approximation for the rank adjacency statistic for spatial clustering with sparse data

Auteurs :
EKWARU, J.P.
WALTER, S.D.

Description :
The rank adjacency statistic D provides a simple method to assess regional clustering. The usual normal approximation is found to give inaccurate results if the data are sparse and some regions have tied ranks. Ajusted formulae for the moments of D that allow for the existence of ties are derived. It is a valid approximate method to evaluate spatial clustering, even in sparse data situations (for mortality).


Type de document :
Article de périodique

Source :
Geographical analysis, issn : 0016-7363, 2001, vol. 33, n°. 1, p. 29-39, Collation : Illustration, Références bibliographiques : 15 ref.

Date :
2001

Editeur :
Pays édition : Etats-Unis, Columbus, OH, Ohio State University Press

Langue :
Anglais
Droits :
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