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arXiv 0909.3034math.STmath.PRstat.MEstat.TH
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基于新的随机有向图族控制数的空间聚类检验

Spatial Clustering Tests Based on Domination Number of a New Random Digraph Family

Elvan Ceyhan

摘要:

我们使用的控制数的参数化的随机有向图的家庭称为比例边接近捕捉有向图(PCD)测试多元空间点模式。这个有向图族是基于来自不同类的数据点的相对位置。我们扩展的比例边PCD的控制数的分布结果,并使用控制数作为一个统计测试隔离和协会对完全的空间随机性。我们证明了当一类的规模固定而另一类(其点构成有向图的顶点)的规模趋于无穷大时,PCD的控制数服从二项分布;当两类的规模都趋于无穷大时,PCD的控制数服从渐近正态性.我们通过Monte Carlo模拟评估了有限样本测试的性能,证明了测试的一致性下的替代品,并建议修正的支持限制类的兴趣点和小样本。我们找到了最佳的参数来测试每个隔离和关联的替代品。此外,本文中讨论的方法也适用于更高维度的数据。

英文摘要:

We use the domination number of a parametrized random digraph family called proportional-edge proximity catch digraphs (PCDs) for testing multivariate spatial point patterns. This digraph family is based on relative positions of data points from various classes. We extend the results on the distribution of the domination number of proportional-edge PCDs, and use the domination number as a statistic for testing segregation and association against complete spatial randomness. We demonstrate that the domination number of the PCD has binomial distribution when size of one class is fixed while the size of the other (whose points constitute the vertices of the digraph) tends to infinity and asymptotic normality when sizes of both classes tend to infinity. We evaluate the finite sample performance of the test by Monte Carlo simulations, prove the consistency of the test under the alternatives, and suggest corrections for the support restriction on the class of points of interest and for small samples. We find the optimal parameters for testing each of the segregation and association alternatives. Furthermore, the methodology discussed in this article is valid for data in higher dimensions also.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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