Keyphrases
- information gain
- sentiment analysis
- feature selection
- text classification
- text categorization
- opinion mining
- chi squared
- sentiment classification
- mutual information
- decision trees
- feature subset
- naive bayes
- text mining
- high dimensional
- document frequency
- feature set
- multi class
- machine learning
- natural language processing
- product reviews
- classification accuracy
- feature space
- information extraction
- knn
- text documents
- prior knowledge
- support vector
- correlation based feature selection
- data sets
- unsupervised learning
- support vector machine
- feature extraction
- databases