CODEWITHSUNDEEP
rnlpqdap
Rana Usman
Rana Usman

Reputation: 1051

Update qdap Dictionary for Sentiment Analysis

I am using polarity function from qdap. There are few words that I want to add to dictionary as negative when said in combination. For instance.

"Pretty Bad"

The polarity score becomes neutral when this is sent into polarity function.

> polarity("Pretty Bad")
  all total.sentences total.words ave.polarity sd.polarity stan.mean.polarity
1 all               1           2            0          NA                 NA

Because it considers pretty as good word and bad as bad one, hence the aggregate becomes neutral.

I want to get rid of this and want to add couple of custom words.

Upvotes: 0

Views: 492

Answers (1)

joy_1379
joy_1379

Reputation: 499

To add words in dictionary use sentiment_frame and make your own lexicon. You can add more words as per your requirement. By default polarised words in key.pol is used. check ?polarity 

library(qdap)
polarity("pretty bad") 
# customised lexicon
positives = c("good","great")
negatives = c("bad","badly")
new_lexicon <- sentiment_frame(positives,negatives, pos.weights = 1, neg.weights = -1)  
counts(polarity("pretty bad",polarity.frame = new_lexicon))

Upvotes: 1

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