March 4, 2019

This subdirectory contains the following Matlab source codes for uniformly sparse matrix factorization:

runcode_sparsematrix.m   Run code for Table 4 of the paper
  
NPG_BB.m                 Implementation of SpFeas_DC_ls

NPG_constant.m           Implementation of SpFeas_DC

sparsematrix.m           Subroutines of NPG_BB and NPB_constant, projection onto the set of matrices with s-sparse columns


Implementation and numerical experience with the above codes are described in the paper: 
    Chen Chen, Ting Kei Pong, Lulin Tan and Liaoyuan Zeng
    "A difference-of-convex approach for split feasibility with applications to matrix factorizations and outlier detection",
    Submitted.
These codes were last updated on Feb 23, 2019.

Questions/comments/suggestions about the codes are welcome.  

Ting Kei Pong, tk.pong@polyu.edu.hk