Owl_nlp_ldaSourceNLP: LDA module
Type of LDA model.
``init ~iter k v d`` inits an LDA model for training. The default iteration is 100.
Parameters: * ``iter``: number of iterations. * ``k``: number of topics. * ``d``: corpus.
After calling ``init``, calling this function starts the training.
Function for printing out log information, tailored for LDA training.
Include a token in model, used in training and you are not supposed to use it.