Keyphrases
- nonnegative matrix factorization
- matrix factorization
- probabilistic latent semantic indexing
- negative matrix factorization
- data representation
- active set
- spectral clustering
- least squares
- nonnegative matrix
- document clustering
- original data
- principal component analysis
- objective function
- data sets
- data analysis
- factor matrices
- image processing
- low rank
- support vector