Successfully reported this slideshow.
We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. You can change your ad preferences anytime.

Introduction to Sentiment Analysis

18,479 views

Published on

An Introduction to Sentiment Analysis

Published in: Technology, Business

Introduction to Sentiment Analysis

  1. 1. An Introduction to Sentiment Analysis Jaganadh G Text Analytics Consultant http://jaganadhg.in jaganadhg@gmail.com 5th Jan 2013 Jaganadh G An Introduction to Sentiment Analysis
  2. 2. About me !! Software Engineer Specializing in Text Analytics Research & Development When free, teaches Python, Speaks about FOSS and blogs at http://jaganadhg.in Working as Big Data Specialist for a Fortune 500 Company I am a computational linguist / Linguist and Indologist, Book reviewer Maters Degree Holder in Sanskrit from University of Kerala Jaganadh G An Introduction to Sentiment Analysis
  3. 3. Introduction Web Today Jaganadh G An Introduction to Sentiment Analysis
  4. 4. Introduction Sentiment Picture Courtesy: http://webanalysis.blogspot.com/2011/09/sentiment-indicator-social-media-kpi.html Jaganadh G An Introduction to Sentiment Analysis
  5. 5. Introduction What other people think!!! Jaganadh G An Introduction to Sentiment Analysis
  6. 6. Introduction Friends and Family Picture Courtesy: http://ianvaleza.com/mlm-secrets-warm-market-approach-strategies/ Jaganadh G An Introduction to Sentiment Analysis
  7. 7. Introduction Survey Picture Courtesy: http://www.oksociety.in/the-guest-for-legitmate-sites-for-paid-surveys/ Jaganadh G An Introduction to Sentiment Analysis
  8. 8. Introduction Blogs, Forums, Social Network .... Picture Courtesy: http://imfoundation.blogspot.com/p/im-forumsblogs.html Picture Courtesy:http://www.my-social-network.org/ Jaganadh G An Introduction to Sentiment Analysis
  9. 9. Introduction Issues with blogs and forums Picture Courtesy: http://www.asunseenontv.com/4-fake-reviews/ Jaganadh G An Introduction to Sentiment Analysis
  10. 10. Introduction Now : Sentiment Analysis Jaganadh G An Introduction to Sentiment Analysis
  11. 11. What is Sentiment Analysis Sentiment Analysis Automated extraction of subjective content from digital text and predicting the subjectivity such as positive or negative. Jaganadh G An Introduction to Sentiment Analysis
  12. 12. Subjectivity Subjectivity Linguistic expression of somebody’s emotions, opinions, sentiment ....... Picture Courtesy: http://www.asunseenontv.com/4-fake-reviews/ Jaganadh G An Introduction to Sentiment Analysis
  13. 13. Subjective Text Sources Social Media Picture Courtesy: http://www.alchemyuk.com/online marketing/social media marketing.php Jaganadh G An Introduction to Sentiment Analysis
  14. 14. Example Review Nokia Lumia 800 Review Courtesy: http://www.techradar.com/reviews/phones/mobile-phones/nokia-lumia-800-1039101/user-review Jaganadh G An Introduction to Sentiment Analysis
  15. 15. The Big Picture Sentiment Analysis Jaganadh G An Introduction to Sentiment Analysis
  16. 16. Basics of Sentiment Analysis Components of Opinion Jaganadh G An Introduction to Sentiment Analysis
  17. 17. Basics of Sentiment Analysis Opinion Definition Jaganadh G An Introduction to Sentiment Analysis
  18. 18. Components of Sentiment Analysis Components Jaganadh G An Introduction to Sentiment Analysis
  19. 19. Approaches Approaches Lexicon based Supervised Learning Unsupervised Learning Keyword Jaganadh G An Introduction to Sentiment Analysis
  20. 20. Issues and Challenges Challenges Picture Courtesy: http://inventionmachine.com/the-Sustainable-Innovation-Blog/bid/51703/Three-Key- Challenges-to-Entering-New-Markets Jaganadh G An Introduction to Sentiment Analysis
  21. 21. Issues and Challenges Challenges Language Domain Spam Named Entity Identification Reliable content Jaganadh G An Introduction to Sentiment Analysis
  22. 22. Questions ?? Jaganadh G An Introduction to Sentiment Analysis
  23. 23. References B. Pang, Lillian Lee Opinion Mining and Sentiment Analysis, Now Publishers Inc, July 2008. B. Pang, Lillian Lee, S Vaithyanathan Thumbs up? sentiment classification using machine learning techniques, 2002. Jaganadh G An Introduction to Sentiment Analysis
  24. 24. Finally Jaganadh G An Introduction to Sentiment Analysis

×