On median-type estimators of direction for the von Mises—Fisher distribution
von Mises–Fisher 分布方向参数的中位数型估计AI 解读 ↓
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von Mises–Fisher 分布方向参数的中位数型估计AI 解读 ↓
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We study three median-type estimators of direction: the normalized spatial median, L1-estimator on the sphere and spherical median. Their asymptotic distributions, efficiencies, influence functions and sensitivities are given at the von Mises-Fisher model. A simulation study is also carried out to compare their finite sample performance in terms of mean squared errors. We conclude that overall the normalized spatial median is the preferred estimator.
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