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Improved Statistics Estimation And Feature Extraction For Hyperspectral Data Classification
, 2001
"... vii CHAPTER 1: ..."
On a Resampling Approach to Choosing the Number of Components in Normal Mixture Models
 Proceedings of Interface 96, 28th Symposium on the Interface
, 1997
"... We consider the fitting of a gcomponent normal mixture to multivariate data. The problem is to test whether g is equal to some specified value versus some specified alternative value. This problem would arise, for example, in the context of a cluster analysis effected by a normal mixture model, wh ..."
Abstract

Cited by 3 (1 self)
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We consider the fitting of a gcomponent normal mixture to multivariate data. The problem is to test whether g is equal to some specified value versus some specified alternative value. This problem would arise, for example, in the context of a cluster analysis effected by a normal mixture model, where the decision on the number of clusters is undertaken by testing for the smallest value of g compatible with the data. A test statistic can be formed in terms of the likelihood ratio. Unfortunately, regularity conditions do not hold for the likelihood ratio statistic to have its usual asymptotic null distribution of chisquared. One approach to the assessment of P values with the use of this statistic is to adopt a resampling approach. An investigation is undertaken of the accuracy of P values assessed in this manner. 1 Introduction Often an important consideration in cluster analysis is deciding on the number of clusters in the data. With a mixture modelbased method of clustering, th...
BMC Evolutionary Biology BioMed Central
, 2007
"... Research article Evaluation of the models handling heterotachy in phylogenetic inference ..."
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Research article Evaluation of the models handling heterotachy in phylogenetic inference