Keyphrases
- nonnegative matrix factorization
- data matrix
- probabilistic latent semantic indexing
- matrix factorization
- negative matrix factorization
- rows and columns
- data representation
- active set
- nonnegative matrix
- least squares
- spectral clustering
- principal component analysis
- document clustering
- three dimensional
- binary matrix
- objective function
- data sets
- sparsity constraints
- feature selection
- knowledge discovery
- recommender systems
- pattern recognition
- machine learning