Implementation of some constrained clustering algorithms.

@article{Song13, author = {Yangqiu Song and Shimei Pan and Shixia Liu and Furu Wei and Michelle X. Zhou and Weihong Qian}, title = {Constrained Text Coclustering with Supervised and Unsupervised Constraints}, journal = {IEEE Trans. Knowl. Data Eng.}, volume = {25}, number = {6}, year = {2013}, pages = {1227--1239}, }