• This is an implementation in java for our paper "Dynamic Clustering of Contextual Multi-Armed Bandits" (Nguyen & Lauw, CIKM 2014)

The folder includes:

• Data: for importing the Delicious and LastFM database (using MYSQL(usr: 'root', pw: '') for connection).
• Input: the norm matrix after reducing dimensions.
• Output: the results is separated into N-tries (N threads) for taking the average.

*** Run from terminal:

java -Xmx4G -jar cikm.jar [args]

with arguments in order below:

• 1st: algorithm selection (1-LinUCBSIN; 2-LinUCBIND; 3-DynUCB)
• 2nd: dataset selection (1-delicious; 2-lastfm)
• 3rd: the number of running times/threads of the selected algorithm (e.g. 10)
• 4th: the number of iterations (e.g. 50000)
• 5th(optional): the number of clusters (default 16-clusters) in case of choosing DynUCB algorithm

• Running DynUCB algorithm on Delicious dataset with 16 clusters, 10 threads, 50000 iterations.\

java -Xmx4G -jar cikm.jar 3 1 10 50000 16

If you use DynUCB in your research, please cite the paper with the bibtex format below:

@inproceedings{
    nguyen2014dynamic,
    title={Dynamic clustering of contextual multi-armed bandits},
    author={Nguyen, Trong T and Lauw, Hady W},
    booktitle={Proceedings of the 23rd ACM International Conference on Conference on Information and Knowledge Management},
    pages={1959--1962},
    year={2014},
    organization={ACM}
}