Class: VaderSentimentRuby::SentimentIntensityAnalyzer

Inherits:
Object
  • Object
show all
Defined in:
lib/vader_sentiment_ruby/sentiment_intensity_analyzer.rb

Overview

Returns a sentiment intensity score for sentences.

Instance Method Summary collapse

Constructor Details

#initialize ⇒ SentimentIntensityAnalyzer

Returns a new instance of SentimentIntensityAnalyzer.



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# File 'lib/vader_sentiment_ruby/sentiment_intensity_analyzer.rb', line 6

def initialize
  @lexicon = LexiconDictionaryCreator.new.call
  @emojis = EmojisDictionaryCreator.new.call
end

Instance Method Details

#polarity_scores(text) ⇒ Hash

Returns a float for sentiment strength based on the input text. Positive values are positive valence, negative value are negative valence.

Parameters:

  • text (String) —

    Text to analyze

Returns:

  • (Hash) —

    Hash of sentiments for analyzed text



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# File 'lib/vader_sentiment_ruby/sentiment_intensity_analyzer.rb', line 15

def polarity_scores(text)
  text = EmojiDescriber.new(text, @emojis).call
  senti_text = SentimentPropertiesIdentifier.new(text)

  sentiments = []
  words_and_emoticons = senti_text.words_and_emoticons
  words_and_emoticons.each_with_index do |item, index|
    sentiments << prepare_valence(item, index, words_and_emoticons, senti_text)
  end

  sentiments = Checker::ButWordNegationChecker.new(words_and_emoticons, sentiments).call

  ValenceScoreCalculator.new(sentiments, text).call
end