Nonparametric Latent Dirichlet Allocation

An alternative view of latent Dirichlet allocation using a Dirichlet process, and a demonstration of how it can be easily extended to a nonparametric model using a hierarchical Dirichlet process.

Sampling from a Hierarchical Dirichlet Process

Code demonstrating how you can sample from a hierarchical Dirichlet process without generating an infinite number of parameters first.

Dirichlet Distribution and Dirichlet Processes

A quick review of the Dirichlet distribution and an introduction to the Dirichlet process by analogy with the Dirichlet distribution.

How I Became a Data Scientist Despite Having Been a Math Major

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