Learning Bayesian Models with R

Exercises

1. For the Reuter_50_50 dataset, fit the LDA model using the lda.collapsed.gibbs.sampler function in the lda package and compare performance with that of the topicmodels package. Note that you need to convert the document-term matrix to lda format using the dtm2ldaformat( ) function in the topicmodels package in order to use the lda package.