Bad performance in document classification

Hi Taehoon,

Thank you for sharing your implementation. Have you tried applying the NVDM model in some downstream tasks like document classification? I did not find such experiments in the original paper, so I did my own. After running your code on the 20 Newsgroups data set and training a simple classifier on learned document representations, I got a quite low accuracy (5% in my experiment). In addition, I found when I set max_iter too large, I got NaN errors when running the code.

Any help will be highly appreciated！

Thanks, Hugo