Mixtures of concentrated multivariate sine distributions with applications to bioinformatics
Mixtures of concentrated multivariate sine distributions with applications to bioinformatics
复制标题
集中多元正弦分布的混合及其在生物信息学中的应用
DOI:
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发表时间:
2012
期刊:
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通讯作者:
T. Hamelryck
中科院分区:
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作者:
K. Mardia;J. Kent;Zizhao Zhang;C. Taylor;T. Hamelryck
Motivated by examples in protein bioinformatics, we study a mixture model of multivariate angular distributions. The distribution treated here (multivariate sine distribution) is a multivariate extension of the well-known von Mises distribution on the circle. The density of the sine distribution has an intractable normalizing constant and here we propose to replace it in the concentrated case by a simple approximation. We study the EM algorithm for this distribution and apply it to a practical example from protein bioinformatics.