Sentiment score defined as the difference between positive and negative word counts divided by the total number of words.
ruleSentiment(dtm, d)Sentiment score in the range of -1 to 1.
Document-term matrix
Dictionary of type SentimentDictionaryBinary
Given the number of positive words \(P\) and the number of
negative words \(N\). Further, let \(T\) denote the total number of words
in that document. Then, the sentiment ratio is defined as
$$\frac{P-N}{T}$$. Here, it uses the entries negativeWords and
positiveWords of the SentimentDictionaryBinary.