Posts tagged pymc3.Dirichlet

Dirichlet mixtures of multinomials

• 08 January 2022
• Category: advanced
• Tags: mixture model pymc3.Dirichlet pymc3.DirichletMultinomial pymc3.Lognormal pymc3.Model pymc3.Multinomial

This example notebook demonstrates the use of a Dirichlet mixture of multinomials (a.k.a Dirichlet-multinomial or DM) to model categorical count data. Models like this one are important in a variety of areas, including natural language processing, ecology, bioinformatics, and more.

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Marginalized Gaussian Mixture Model

• 18 September 2021
• Category: intermediate
• Tags: mixture model pymc3.Dirichlet pymc3.Gamma pymc3.Model pymc3.Normal pymc3.NormalMixture

Gaussian mixtures are a flexible class of models for data that exhibits subpopulation heterogeneity. A toy example of such a data set is shown below.

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Gaussian Mixture Model

• 18 September 2021
• Category: intermediate
• Tags: mixture model pymc3.Categorical pymc3.CategoricalGibbsMetropolis pymc3.Dirichlet pymc3.Metropolis pymc3.Model pymc3.Normal pymc3.Potential pymc3.Uniform

Original NB by Abe Flaxman, modified by Thomas Wiecki

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