A badly-written Weka example project about sentiment analysis.
Weka is a suite of machine learning algorithms written in Java. For more information please visit its website here.
Documentation about how to use Weka in your code:
- P. D. Turney. Thumbs Up or Thumbs Down? Semantic Orientation Applied to Unsupervised Classification of Reviews. Proceedings of the 40th Annual Meeting of the Association for Computational Linguistics. 417-424, (2002).
- B. Pang, L. Lee, S. Vaithyanathan. Thumbs Up? Sentiment Classification Using Machine Learning Techniques. Proceedings of the ACL-02 Conference on Empirical Methods in Natural Language Processing. 79-86. (2002).
I've taken it from Sentiment140, a website that can discover a Twitter sentiment for a brand or product.