Keyphrases
- classification systems
- feature selection
- text categorization
- feature extraction
- feature space
- support vector machine
- feature set
- feature selection algorithms
- classification accuracy
- multi class
- selected features
- feature selection and classification
- irrelevant features
- discriminative features
- informative features
- unsupervised learning
- method for feature selection
- mutual information
- unsupervised feature selection
- learning algorithm
- hierarchical text classification
- small sample
- feature ranking
- feature weighting
- microarray data
- gene expression data
- text classification
- support vector