High Quality Content by WIKIPEDIA articles! In directional statistics, the von Mises–Fisher distribution is a probability distribution on the p ? 1 dimensional sphere in R. If p = 2 the distribution reduces to the von Mises distribution on the circle. The probability density function of the von Mises-Fisher distribution for the random p-dimensional unit vector x. The parameters Mu, and K, are called the mean direction and concentration parameter, respectively. The greater the value of K, the higher the concentration of the distribution around the mean direction Mu. The distribution is unimodal for K>0, and is uniform on the sphere for K=0.

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