INTERPOINT SQUARED DISTANCE AS A MEASURE OF SPATIAL CLUSTERING

被引：4
|
作者：
SELVIN, S
SCHULMAN, J
MERRILL, DW
机构：
[1] MARCH DIMES BIRTH DEFECT FDN,BIRTH DEFECTS MONITORING PROGRAM,BERKELEY,CA
[2] LAWRENCE BERKELEY LAB,DIV INFORMAT & COMP SCI,BERKELEY,CA 94720
来源：
SOCIAL SCIENCE & MEDICINE | 1993年 / 36卷 / 08期
关键词：
MEAN INTERPOINT SQUARED DISTANCE; MOMENTS; POWER; SPATIAL ANALYSIS; LYMPHOMA;
D O I：
10.1016/0277-9536(93)90118-N
中图分类号：
R1 [预防医学、卫生学];
学科分类号：
1004 ; 120402 ;
摘要：
The expectation and variance for the mean interpoint squared distance are presented. In order to evaluate these expressions it is necessary to calculate the moments of a bivariate uniform distribution defined over an arbitrary polygon. Expressions for these moments are presented, allowing the mean interpoint squared distance to be used as a measure of spatial clustering. The distribution and power of this test statistic is explored on the unit square, and the spatial distribution of 11 cases of non-Hodgkin's lymphoma is investigated to illustrate an application of the approach.
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页码：1011 / 1016
页数：6
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