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Streaming Gibbs Sampling for LDA Model

Research paper by Yang Gao, Jianfei Chen, Jun Zhu

Indexed on: 06 Jan '16Published on: 06 Jan '16Published in: Computer Science - Learning



Abstract

Streaming variational Bayes (SVB) is successful in learning LDA models in an online manner. However previous attempts toward developing online Monte-Carlo methods for LDA have little success, often by having much worse perplexity than their batch counterparts. We present a streaming Gibbs sampling (SGS) method, an online extension of the collapsed Gibbs sampling (CGS). Our empirical study shows that SGS can reach similar perplexity as CGS, much better than SVB. Our distributed version of SGS, DSGS, is much more scalable than SVB mainly because the updates' communication complexity is small.