ã¯ããã« S. Wang & C. D. Manning, Baselines and Bigrams: Simple, Good Sentiment and Topic Classificatioin Naive Bayesç´ æ§ãå©ç¨ããSVM(NBSVM)ãªããã®ã試ãã¦ã¿ãã SVM with NB features(NBSVM) Log-count ratio r = log( (p / ||p||_1) / (q / ||q||_1) ) æ£ä¾ã«ã¦ã³ããã¯ãã« p = α + Σ_{i:y_i=1} f_i è² ä¾ã«ã¦ã³ããã¯ãã« q = α + Σ_{i:y_i=-1} f_i f_i : åäºä¾iã«ãããç´ æ§ãã¯ã㫠α : ã¹ã ã¼ã¸ã³ã°ç¨ãã©ã¡ã¼ã¿ ã¢ãã« w' = (1-β) * w~ + β * w w~ : ||w||_1 / |V| β : è£éãã©ã¡ã¼ã¿(0ã1)
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