This is the implementation code for CNAFS.
please cite the following reference:
[1] Aihong Yuan, Mengbo You*, Dongjian He and Xuelong Li, "Convex Non-Negative Matrix Factorization With Adaptive Graph for Unsupervised Feature Selection," in IEEE Transactions on Cybernetics, doi: 10.1109/TCYB.2020.3034462, 2020