Keyphrases
- nonnegative matrix factorization
- probabilistic latent semantic indexing
- negative matrix factorization
- matrix factorization
- data representation
- nonnegative matrix
- least squares
- active set
- spectral clustering
- principal component analysis
- sparsity constraints
- document clustering
- objective function
- original data
- pattern recognition
- factor matrices
- multiscale
- data mining