Sentiment Analysis | Machine Learning Algorithms | Data Science Tutorial | Edureka
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The document discusses sentiment analysis, a process of computationally identifying and categorizing opinions expressed in text to determine the writer's attitude toward a topic. It emphasizes the importance of machine learning, outlining its types and how sentiment analysis works through scoring words as positive, negative, or neutral. Additionally, it presents use cases, particularly in enhancing customer experience by analyzing social media sentiments.
Sentiment Analysis | Machine Learning Algorithms | Data Science Tutorial | Edureka
- 1. www.edureka.co/data-scienceEdureka’s Data Science Certification Training Sentiment Analysis
- 2. www.edureka.co/data-scienceEdureka’s Data Science Certification Training What Will You Learn Today? Why Sentiment Analysis? What is Machine Learning? What is Sentiment Analysis? How Sentiment Analysis Works? Sentiment Analysis - Demo 1 2 3 4 65 Sentiment Analysis – Use Case
- 3. www.edureka.co/data-scienceEdureka’s Data Science Certification Training What is Machine Learning?
- 4. www.edureka.co/data-scienceEdureka’s Data Science Certification Training What is Machine Learning? Machine learning is a type of artificial intelligence (AI) that provides computers with the ability to learn without being explicitly programmed. Machine learning focuses on the development of computer programs that can change when exposed to new data.
- 5. www.edureka.co/data-scienceEdureka’s Data Science Certification Training What is Machine Learning? Types of Machine Learning: Supervised Learning Reinforcement Learning Unsupervised Learning Types of Learning
- 6. www.edureka.co/data-scienceEdureka’s Data Science Certification Training What is Machine Learning? Types of Machine Learning: Supervised Learning Reinforcement Learning Unsupervised Learning Types of Learning
- 7. www.edureka.co/data-scienceEdureka’s Data Science Certification Training What is Machine Learning? Types of Machine Learning: Supervised Learning Reinforcement Learning Unsupervised Learning Types of Learning
- 8. www.edureka.co/data-scienceEdureka’s Data Science Certification Training What is Machine Learning? Types of Machine Learning: Supervised Learning Reinforcement Learning Unsupervised Learning Types of Learning Sentiment Analysis
- 9. www.edureka.co/data-scienceEdureka’s Data Science Certification Training Why Sentiment Analysis?
- 10. www.edureka.co/data-scienceEdureka’s Data Science Certification Training Why Sentiment Analysis? Let’s take an example here: Suppose you have an application which is very famous, and has around a billion users, and you decide to add a new functionality to your application, how will you get the feedback for it?
- 11. www.edureka.co/data-scienceEdureka’s Data Science Certification Training Why Sentiment Analysis? Let’s take an example here: Suppose you have an application which is very famous, and has around a billion users, and you decide to add a new functionality to your application, how will you get the feedback for it? Comes in, Sentiment Analysis, so now you can focus on your negative posts, and improve your application!! Cool Right?
- 12. www.edureka.co/data-scienceEdureka’s Data Science Certification Training What is Sentiment Analysis?
- 13. www.edureka.co/data-scienceEdureka’s Data Science Certification Training What is Sentiment Analysis? The process of computationally identifying and categorizing opinions expressed in a piece of text, especially in order to determine whether the writer's attitude towards a particular topic, product, etc. is positive, negative, or neutral.
- 14. www.edureka.co/data-scienceEdureka’s Data Science Certification Training What is Sentiment Analysis? The process of computationally identifying and categorizing opinions expressed in a piece of text, especially in order to determine whether the writer's attitude towards a particular topic, product, etc. is positive, negative, or neutral. Remember this?
- 15. www.edureka.co/data-scienceEdureka’s Data Science Certification Training How does it work?
- 16. www.edureka.co/data-scienceEdureka’s Data Science Certification Training How does it work? Good Question! It’s very simple though. Positive Words Negative Words
- 17. www.edureka.co/data-scienceEdureka’s Data Science Certification Training How does it work? Good Question! It’s very simple though. Database Positive Words Negative Words
- 18. www.edureka.co/data-scienceEdureka’s Data Science Certification Training How does it work? Good Question! It’s very simple though. Score +1 for good -1 for bad 0 for neutral Positive Words Negative Words Sample Statement Neutral Sentences Positive Sentences Negative Sentences
- 19. www.edureka.co/data-scienceEdureka’s Data Science Certification Training How Does the Algorithm Work? Positive Words Negative Words This is a sample statement *The words that are neither in positive nor in negative words would be neutral words with value 0
- 20. www.edureka.co/data-scienceEdureka’s Data Science Certification Training Sentiment Analysis : Example
- 21. www.edureka.co/data-scienceEdureka’s Data Science Certification Training Let’s take a sample statement here, with sample datasets. Sentiment Analysis Example The Iphone7 is awesome! = +1 Good Awesome Great Happy Yes Interesting Bad Hate Sad Least Not Boring
- 22. www.edureka.co/data-scienceEdureka’s Data Science Certification Training Let’s take a sample statement here, with sample datasets. Sentiment Analysis Example This movie is not that great, after the interval it was boring! = -1 +1 -1 = -1 Good Awesome Great Happy Yes Interesting Bad Hate Sad Least Not Boring
- 23. www.edureka.co/data-scienceEdureka’s Data Science Certification Training Let’s take a complex statement now, Sentiment Analysis Example The service was terrible, but the food was great! Now how will you solve this?
- 24. www.edureka.co/data-scienceEdureka’s Data Science Certification Training Let’s take a complex statement now, Sentiment Analysis Example Such a case is called Constructive Conjunction. The service was terrible, but the food was great! The way we solve it is like this, whenever there is a BUT in the sentence, it reforms the sentence like this, The service was terrible AND But the food was great! 1. 2. Hence, calculate their scores separately, this method is called Binary Sentiment Analysis
- 25. www.edureka.co/data-scienceEdureka’s Data Science Certification Training Demo in R
- 26. www.edureka.co/data-scienceEdureka’s Data Science Certification Training Demo in R We are going to do an El Clasico comparison of Real Madrid and Barcelona and see who is getting more positive tweets. BarcelonaReal Madrid C.F
- 27. www.edureka.co/data-scienceEdureka’s Data Science Certification Training Sentiment Analysis : Use Case
- 28. www.edureka.co/data-scienceEdureka’s Data Science Certification Training Sentiment Analysis: Use Case Enhancing Customer Experience Customer experiences fall into three basic categories, positive, negative or neutral. Through sentiment analysis, companies can detect the tone and temperament of each and every word found in a customer’s social postings. With this, businesses can gain valuable insights into what they are doing right with regard to products, services and customer support and what they need to work on negative sentiments in order to enhance the overall customer experience.
- 29. www.edureka.co/data-scienceEdureka’s Data Science Certification Training