Keyphrases
- nonnegative matrix factorization
- basis vectors
- principal component analysis
- probabilistic latent semantic indexing
- negative matrix factorization
- data representation
- matrix factorization
- objective function
- low rank approximation
- least squares
- data matrix
- nonnegative matrix
- hilbert space
- high dimensional
- spectral clustering
- feature space
- dimensionality reduction
- low dimensional
- subspace learning
- input data
- document clustering
- multiscale
- missing data
- search engine
- relational databases
- data analysis
- feature extraction
- feature selection