Provided with the set of anchor words S and the convex coefficientsB ki = {p Z 1 |X 1 (k|i)}, one can easily recover B by applying Bayes' rule: , where c i := p X 1 (i) is the unigram probability of the word i, which is equal to j C ij .
our RAW method takes less than 10 minutes to find 50 topics on Songs.