Keyphrases
- subspace learning
- unsupervised feature selection
- dimensionality reduction
- sparse representation
- sparse coding
- data representation
- low dimensional
- high dimensional
- face recognition
- nonnegative matrix factorization
- feature selection
- manifold learning
- data clustering
- principal component analysis
- high dimensional data
- pattern recognition
- objective function
- learning algorithm
- linear combination
- collaborative filtering
- semi supervised
- pairwise
- similarity measure
- feature extraction