PHD Discussions Logo

Ask, Learn and Accelerate in your PhD Research

Question Icon Post Your Answer

Question Icon

How do I implement feature selection methods for sentiment analysis in Python?

How can I apply feature selection techniques to improve a sentiment analysis model in Python?

All Answers (1 Answers In All)

By Nisha Ali Answered 1 year ago

A common Python implementation for feature selection in sentiment analysis uses `scikit-learn` and `nltk`, beginning with standard text preprocessing like tokenization and stopword removal. The text is then vectorized using `CountVectorizer` or `TfidfVectorizer`, after which statistical scoring functions such as Chi-Square (`chi2`) or Mutual Information are applied to evaluate term importance. The top-k features are retained using `SelectKBest`, which reduces the feature set for training a classifier like SVM or Logistic Regression, thereby improving model efficiency and often enhancing predictive performance by filtering out irrelevant noise.

Your Answer