Software
Original Work
Dirichlet Forest LDA
A variant of Latent Dirichlet Allocation which uses a novel Dirichlet Forest prior on the topic-word multinomials. This prior allows the user to express "must-link" and "cannot-link" constraints between pairs of words in order to guide topic recovery.(pdf,slides,code)
DeltaLDA
A variant of Latent Dirichlet Allocation which allows the use of "shared" topics common to all documents as well as "exclusive" topics which appear only in special documents.(pdf,slides,code)
z-label LDA
A variant of Latent Dirichlet Allocation which allows the use of (possibly soft) observations of specific latent topic assignments (z-labels). Set labels are possible as well (eg, z must be in set C).(pdf,code)
Other Code
CVB LDA
An implementation of collapsed variational Bayesian inference for standard LDA, from "A Collapsed Variational Bayesian Inference Algorithm for Latent Dirichlet Allocation" by Teh Y.W., Newman D., and Welling, M (NIPS 2007). I implemented this algorithm in order to gain a better understanding of it.(code)