Keyphrases
- nonnegative matrix factorization
- sparsity constraints
- principal component analysis
- negative matrix factorization
- probabilistic latent semantic indexing
- matrix factorization
- least squares
- active set
- low rank approximation
- nonnegative matrix
- sparse representation
- data representation
- data matrix
- spectral clustering
- high dimensional
- document clustering
- feature extraction
- low dimensional
- dimensionality reduction
- objective function
- sparse coding
- original data
- signal processing
- data analysis
- data sets