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Exact distributional computations for Roy's statistic and the largest eigenvalue of a Wishart distribution

机译:Roy统计量和Wishart分布的最大特征值的精确分布计算

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Computational expressions for the exact CDF of Roy's test statistic in MANOVA and the largest eigenvalue of a Wishart matrix are derived based upon their Pfaffian representations given in Gupta and Richards (SIAM J. Math. Anal. 16:852-858, 1985). These expressions allow computations to proceed until a prespecified degree of accuracy is achieved. For both distributions, convergence acceleration methods are used to compute CDF values which achieve reasonably fast run times for dimensions up to 50 and error degrees of freedom as large as 100. Software that implements these computations is described and has been made available on the Web.
机译:根据古普塔和理查兹(SIAM J. Math。Anal。16:852-858,1985)给出的Pfaffian表示,得出MANOVA中Roy检验统计量的精确CDF和Wishart矩阵的最大特征值的计算表达式。这些表达式允许进行计算,直到达到预定的精度为止。对于这两种分布,都使用收敛加速方法来计算CDF值,该CDF值在尺寸高达50和误差自由度高达100的情况下可以实现相当快的运行时间。描述了实现这些计算的软件,该软件已在Web上提供。

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