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SentimentAnalysis (version 1.3-4)

ruleSentiment: Sentiment score

Description

Sentiment score defined as the difference between positive and negative word counts divided by the total number of words.

Usage

ruleSentiment(dtm, d)

Value

Sentiment score in the range of -1 to 1.

Arguments

dtm

Document-term matrix

d

Dictionary of type SentimentDictionaryBinary

Details

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.