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Applied Supervised Learning with Python

Applied Supervised Learning with Python

By : Benjamin Johnston, Ishita Mathur
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Applied Supervised Learning with Python

Applied Supervised Learning with Python

5 (1)
By: Benjamin Johnston, Ishita Mathur

Overview of this book

Machine learning—the ability of a machine to give right answers based on input data—has revolutionized the way we do business. Applied Supervised Learning with Python provides a rich understanding of how you can apply machine learning techniques in your data science projects using Python. You'll explore Jupyter Notebooks, the technology used commonly in academic and commercial circles with in-line code running support. With the help of fun examples, you'll gain experience working on the Python machine learning toolkit—from performing basic data cleaning and processing to working with a range of regression and classification algorithms. Once you’ve grasped the basics, you'll learn how to build and train your own models using advanced techniques such as decision trees, ensemble modeling, validation, and error metrics. You'll also learn data visualization techniques using powerful Python libraries such as Matplotlib and Seaborn. This book also covers ensemble modeling and random forest classifiers along with other methods for combining results from multiple models, and concludes by delving into cross-validation to test your algorithm and check how well the model works on unseen data. By the end of this book, you'll be equipped to not only work with machine learning algorithms, but also be able to create some of your own!
Table of Contents (9 chapters)
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Classification Using Decision Trees


The final classification method that we will be examining in this chapter is decision trees, which have found particular use in applications such as natural language processing. There are a number of different machine learning algorithms that fall within the overall umbrella of decision trees, such as ID3, CART, and the powerful random forest classifiers (covered in Chapter 5, Ensemble Modeling). In this chapter, we will investigate the use of the ID3 method in classifying categorical data, and we will use the scikit-learn CART implementation as another means of classifying the Iris dataset. So, what exactly are decision trees?

As the name suggests, decision trees are a learning algorithm that apply a sequential series of decisions based on input information to make the final classification. Recalling your childhood biology class, you may have used a process similar to decision trees in the classification of different types of animals via dichotomous keys...

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