Sentiment analysis
Sentiment analysis estimates the evaluative orientation of a text, such as positive, negative or neutral
What it means, how it is used and where it comes up, with its related concepts.
What it is and how it works
It can be carried out manually or automatically. Sarcasm, context and mixed opinions make interpretation harder. It is useful as an aggregate signal when validated, but it is not the same as understanding all of a person's emotions or motives.
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