• P-ISSN 0974-6846 E-ISSN 0974-5645

Indian Journal of Science and Technology


Indian Journal of Science and Technology

Year: 2016, Volume: 9, Issue: 3, Pages: 1-7

Original Article

Feature Selection using Random Forestmethod for Sentiment Analysis


Background/Objectives: Online review has become important decision support system for the customers to decide on the subscription or purchse. This paper is aiming to suggest a method that improves the accuracy of the classifier. Methods/ Statistical analysis: Feature selection for sentiment analysis using decision forest method and Principal Component Analysis (PCA) is used for the feature reduction. The proposed method is evaluated using twitter data set. Findings: It is proved, that the proposed decision forest based feature extraction improves the precision of the classifiers in the range of 12.49% to 62.5% when compared to PCA and by 49.5% to 62.5% when compared to decision tree based feature selection. Application/Improvements: This method is applicable to product reviews, emotion detection, Knowledge transformation, and predictive analytics.

Keywords: Inverse Document Frequency (IDF), Learning Vector Quantization (LVQ), Opinion Mining, Principal Component Analysis (PCA), Sentiment analysis, Twitter 


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