Book Image

The Supervised Learning Workshop - Second Edition

By : Blaine Bateman, Ashish Ranjan Jha, Benjamin Johnston, Ishita Mathur
Book Image

The Supervised Learning Workshop - Second Edition

By: Blaine Bateman, Ashish Ranjan Jha, Benjamin Johnston, Ishita Mathur

Overview of this book

Would you like to understand how and why machine learning techniques and data analytics are spearheading enterprises globally? From analyzing bioinformatics to predicting climate change, machine learning plays an increasingly pivotal role in our society. Although the real-world applications may seem complex, this book simplifies supervised learning for beginners with a step-by-step interactive approach. Working with real-time datasets, you’ll learn how supervised learning, when used with Python, can produce efficient predictive models. Starting with the fundamentals of supervised learning, you’ll quickly move to understand how to automate manual tasks and the process of assessing date using Jupyter and Python libraries like pandas. Next, you’ll use data exploration and visualization techniques to develop powerful supervised learning models, before understanding how to distinguish variables and represent their relationships using scatter plots, heatmaps, and box plots. After using regression and classification models on real-time datasets to predict future outcomes, you’ll grasp advanced ensemble techniques such as boosting and random forests. Finally, you’ll learn the importance of model evaluation in supervised learning and study metrics to evaluate regression and classification tasks. By the end of this book, you’ll have the skills you need to work on your real-life supervised learning Python projects.
Table of Contents (9 chapters)

Summary

In this chapter, we started off with a discussion on overfitting and underfitting and how they can affect the performance of a model on unseen data. The chapter looked at ensemble modeling as a solution for these models and went on to discuss different ensemble methods that could be used, and how they could decrease the overall bias or variance encountered when making predictions. We first discussed bagging algorithms and introduced the concept of bootstrapping.

Then, we looked at random forest as a classic example of a bagged ensemble and solved exercises that involved building a bagging classifier and random forest classifier on the previously seen Titanic dataset. We then moved on to discussing boosting algorithms, how they successfully reduce bias in the system, and gained an understanding of how to implement adaptive boosting and gradient boosting. The last ensemble method we discussed was stacking, which, as we saw from the exercise, gave us the best accuracy score...