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Introduction to Sentiment Analysis

This document provides an introduction to sentiment analysis. It begins with an overview of sentiment analysis and what it aims to do, which is to automatically extract subjective content like opinions from digital text and classify the sentiment as positive or negative. It then discusses the components of sentiment analysis like subjectivity and sources of subjective text. Different approaches to sentiment analysis are presented like lexicon-based, supervised learning, and unsupervised learning. Challenges in sentiment analysis are also outlined, such as dealing with language, domain, spam, and identifying reliable content. The document concludes with references for further reading.

Technology◦Business◦
Related topics:
Sentiment Analysis Methods• text-mining• Natural Language Processing•Data Science Insights•
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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
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
Introduction Web Today Jaganadh G An Introduction to Sentiment Analysis
Introduction Sentiment Picture Courtesy: http://webanalysis.blogspot.com/2011/09/sentiment-indicator-social-media-kpi.html Jaganadh G An Introduction to Sentiment Analysis
Introduction What other people think!!! Jaganadh G An Introduction to Sentiment Analysis
Introduction Friends and Family Picture Courtesy: http://ianvaleza.com/mlm-secrets-warm-market-approach-strategies/ Jaganadh G An Introduction to Sentiment Analysis
Introduction Survey Picture Courtesy: http://www.oksociety.in/the-guest-for-legitmate-sites-for-paid-surveys/ Jaganadh G An Introduction to Sentiment Analysis
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
Introduction Issues with blogs and forums Picture Courtesy: http://www.asunseenontv.com/4-fake-reviews/ Jaganadh G An Introduction to Sentiment Analysis
Introduction Now : Sentiment Analysis Jaganadh G An Introduction to Sentiment Analysis
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
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
Subjective Text Sources Social Media Picture Courtesy: http://www.alchemyuk.com/online marketing/social media marketing.php Jaganadh G An Introduction to Sentiment Analysis
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
The Big Picture Sentiment Analysis Jaganadh G An Introduction to Sentiment Analysis
Basics of Sentiment Analysis Components of Opinion Jaganadh G An Introduction to Sentiment Analysis
Basics of Sentiment Analysis Opinion Definition Jaganadh G An Introduction to Sentiment Analysis
Components of Sentiment Analysis Components Jaganadh G An Introduction to Sentiment Analysis
Approaches Approaches Lexicon based Supervised Learning Unsupervised Learning Keyword Jaganadh G An Introduction to Sentiment Analysis
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
Issues and Challenges Challenges Language Domain Spam Named Entity Identification Reliable content Jaganadh G An Introduction to Sentiment Analysis
Questions ?? Jaganadh G An Introduction to Sentiment Analysis
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
Finally Jaganadh G An Introduction to Sentiment Analysis