A not well-known feature of Vowpal Wabbit is Online Latent Dirichlet Allocation. This allows you to do topic modelling on millions of documents in under an hour. Under construction. Come back soon. Latent Dirichlet Allocation Topic modeling Probabilistic topic models are useful for uncovering the underlying semantic structure of a collection of documents. Latent Dirichlet Allocation (LDA) is a hie