paunit + spherical   2

Parameter Estimation for von Mises–Fisher Mixture Model via Gaussian Distribution
A variant of Clustering on the Unit Hypersphere using von Mises-Fisher Distributions using Variational Bayes technique (ouch).
coink  clustering  mixture  von-mises-fisher  spherical  k-means  machine  learning 
january 2019 by paunit
Clustering on the Unit Hypersphere using von Mises-Fisher Distributions
Everything is in the title -- vMF distribution on hypersphere is somehow the "minimal info" parametric distribution targetting a certain mean. Nice derivation of approx for ML estimates for mixtures of vMF and application in large dim (> 100)
coink  clustering  mixture  von-mises-fisher  spherical  k-means  machine  learning 
january 2019 by paunit

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