Non-official Implementation for "Joint Neural Collaborative Filtering for Recommender Systems"
ACM Transactions on Information Systems, Vol. 37, No. 4, Article 39. (August 2019)

https://dl.acm.org/doi/10.1145/3343117
https://arxiv.org/pdf/1907.03459.pdf

It is not sure that this implementation has same performance with authors' experiments.
(Followed the authors' experimental setups as much as possible.)

* python==3.7.6 * pytorch==1.4.0 * numpy==1.18.1 * pandas==1.0.0 * scipy==1.4.1 

If you have any idea to make faster in sparse matrix indexing(input interaction history), please let me know.

cheon.research (at) gmail.com

(some figures will be updated...)