VADER Classifier

VADER (Valence Aware Dictionary for Sentiment Reasoning) is a rule-based Sentiment Analysis tool available in the NLTK library. VADER is particularly effective for analysing social media texts. It uses a lexicon where words are scored for sentiment polarity (positive, negative, neutral, and compound) and intensity. VADER accounts for sentiment intensifiers, negations, and emoticons, making it well-suited for informal text.

Polarity scores in VADER:

  • +1: Extremely Positive
  • +0.5: Positive
  • 0: Neutral
  • -0.5: Negative
  • -1: Extremely Negative

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