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Machine Learning for Imbalanced Data

Machine Learning for Imbalanced Data

By : Kumar Abhishek, Dr. Mounir Abdelaziz
5 (17)
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Machine Learning for Imbalanced Data

Machine Learning for Imbalanced Data

5 (17)
By: Kumar Abhishek, Dr. Mounir Abdelaziz

Overview of this book

As machine learning practitioners, we often encounter imbalanced datasets in which one class has considerably fewer instances than the other. Many machine learning algorithms assume an equilibrium between majority and minority classes, leading to suboptimal performance on imbalanced data. This comprehensive guide helps you address this class imbalance to significantly improve model performance. Machine Learning for Imbalanced Data begins by introducing you to the challenges posed by imbalanced datasets and the importance of addressing these issues. It then guides you through techniques that enhance the performance of classical machine learning models when using imbalanced data, including various sampling and cost-sensitive learning methods. As you progress, you’ll delve into similar and more advanced techniques for deep learning models, employing PyTorch as the primary framework. Throughout the book, hands-on examples will provide working and reproducible code that’ll demonstrate the practical implementation of each technique. By the end of this book, you’ll be adept at identifying and addressing class imbalances and confidently applying various techniques, including sampling, cost-sensitive techniques, and threshold adjustment, while using traditional machine learning or deep learning models.
Table of Contents (15 chapters)
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Preface

Hello and welcome! Machine Learning (ML) enables computers to learn from data using algorithms to make informed decisions, automate tasks, and extract valuable insights. One particular aspect that often garners attention is imbalanced data, where certain classes may have considerably fewer samples than others.

This book provides an in-depth guide to understanding and navigating the intricacies of skewed data. You will gain insights into best practices for managing imbalanced datasets in ML contexts.

While imbalanced data can present challenges, it’s important to understand that the techniques to address this imbalance are not universally applicable. Their relevance and necessity depend on various factors such as the domain, the data distribution, the performance metrics you’re optimizing, and the business objectives. Before adopting any techniques, it’s essential to establish a baseline. Even if you don’t currently face issues with imbalanced data, it can be beneficial to be aware of the challenges and solutions discussed in this book. Familiarizing yourself with these techniques will provide you with a comprehensive toolkit, preparing you for scenarios that you may not yet know you’ll encounter. If you do find that model performance is lacking, especially for underrepresented (minority) classes, the insights and strategies covered in the book can be instrumental in guiding effective improvements.

As the domains of ML and artificial intelligence continue to grow, there will be an increasing demand for professionals who can adeptly handle various data challenges, including imbalance. This book aims to equip you with the knowledge and tools to be one of those sought-after experts.

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