This is the code CMS of paper: Unsupervised Coupled Metric Similarity for Non-IID Categorical Data, TKDE, 2018
File "CMS_similarity" is the main file whose input is the data matrix and the parameter and output is the similarity matrix 
The reference bib is as follows:
@article{jian2018unsupervised,
  title={Unsupervised Coupled Metric Similarity for Non-IID Categorical Data},
  author={Jian, Songlei and Cao, Longbing and Lu, Kai and Gao, Hang},
  journal={IEEE Transactions on Knowledge and Data Engineering},
  year={2018},
  publisher={IEEE}
}