Corpus ID: 16938012

Block Coordinate Descent for Sparse NMF

  title={Block Coordinate Descent for Sparse NMF},
  author={Vamsi K. Potluru and S. Plis and Jonathan Le Roux and Barak A. Pearlmutter and V. Calhoun and T. Hayes},
  • Vamsi K. Potluru, S. Plis, +3 authors T. Hayes
  • Published 2013
  • Computer Science, Mathematics
  • CoRR
  • Nonnegative matrix factorization (NMF) has become a ubiquitous tool for data analysis. An important variant is the sparse NMF problem which arises when we explicitly require the learnt features to be sparse. A natural measure of sparsity is the L$_0$ norm, however its optimization is NP-hard. Mixed norms, such as L$_1$/L$_2$ measure, have been shown to model sparsity robustly, based on intuitive attributes that such measures need to satisfy. This is in contrast to computationally cheaper… CONTINUE READING
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