Book Image

Machine Learning Solutions

Book Image

Machine Learning Solutions

Overview of this book

Machine learning (ML) helps you find hidden insights from your data without the need for explicit programming. This book is your key to solving any kind of ML problem you might come across in your job. You’ll encounter a set of simple to complex problems while building ML models, and you'll not only resolve these problems, but you’ll also learn how to build projects based on each problem, with a practical approach and easy-to-follow examples. The book includes a wide range of applications: from analytics and NLP, to computer vision domains. Some of the applications you will be working on include stock price prediction, a recommendation engine, building a chat-bot, a facial expression recognition system, and many more. The problem examples we cover include identifying the right algorithm for your dataset and use cases, creating and labeling datasets, getting enough clean data to carry out processing, identifying outliers, overftting datasets, hyperparameter tuning, and more. Here, you'll also learn to make more timely and accurate predictions. In addition, you'll deal with more advanced use cases, such as building a gaming bot, building an extractive summarization tool for medical documents, and you'll also tackle the problems faced while building an ML model. By the end of this book, you'll be able to fine-tune your models as per your needs to deliver maximum productivity.
Table of Contents (19 chapters)
Machine Learning Solutions
Foreword
Contributors
Preface
Index

Chapter 5. Sentiment Analysis

So far, we have explored some really cool applications in the analytics domain. In this chapter, we will explore the famous Natural Language Processing (NLP) technique, which you may have already guessed because of the name of the chapter. Absolutely right; we will build a sentiment analysis-based application. In general, everyone is familiar with sentiment analysis-based applications. If you aren't, then don't worry. We will discuss and understand all the necessary details.

First of all, I want to give you a basic idea about sentiment analysis. I will provide an example so it will be easy for you to understand. Regardless of where we live, we all watch movies. Nowadays, we read reviews or others' opinions on various social media platforms. After that, if a majority of the opinions about the movie are good, then we watch that movie. If the opinions are not impressive, we might not watch the movie. So during this entire process, our mind analyzes these opinions...