Vader gives wrong result for some sentences

cjhutto / vaderSentiment

VADER Sentiment Analysis. VADER (Valence Aware Dictionary and sEntiment Reasoner) is a lexicon and rule-based sentiment analysis tool that is specifically attuned to sentiments expressed in social media, and works well on texts from other domains.

MIT License

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Vader gives wrong result for some sentences #36

Closed Chitrank-Dixit closed 6 years ago

Chitrank-Dixit commented 6 years ago

Hello Everyone,

So far Vader has helped me a lot in polarizing the data, I am analyzing on. I got all the analysis right and really like its sentiment intensity scoring.

I am getting just one problem with the sentences like

"Without a doubt excellent idea", "neg": 0.422, "neu": 0.281, "pos": 0.297

"No payment and returning problems" "neg": 0.62, "neu": 0.38, "pos": 0

It is giving wrong results

cjhutto commented 6 years ago

I've added "Without {a} doubt" to the list of negation tokens, so it should appropriately flip the sentiment polarity while maintaining the intensity calculations. When I run my test, I now get the following: Without a doubt, excellent idea. {'neg': 0.305, 'pos': 0.451, 'compound': 0.296, 'neu': 0.244}

For the second example, I would say that VADER is giving correct results... as written, the text appears to be a complaint about getting no payment as well as having problems returning.