public void trainDocuments(
InstanceList documents, int numTopics, int numIterations, double alpha, double beta) {
double alphaSum = alpha * numTopics;
lda = new ParallelTopicModel(numTopics, alphaSum, beta);
lda.addInstances(documents);
lda.setNumThreads(4);
lda.setNumIterations(numIterations);
lda.printLogLikelihood = false;
try {
lda.estimate();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
System.out.println("LDA parameter, alphaSum: " + lda.alphaSum + ", beta: " + lda.beta);
}
