In this document, we fit an LDA topic model to the Cornell Movie Review Data introduced by Pang, Lee, and Vaidyanathan in their 2002 EMNLP paper, where we use 'polarity dataset version 2.0' (introduced in a subsequent Pang and Lee 2004 ACL paper). To fit the model, we used the R package lda and we visualize the output using LDAvis. The data For convenience, the R package 'LDAvisData' provides data