Book Image

Python Machine Learning By Example - Third Edition

By : Yuxi (Hayden) Liu
Book Image

Python Machine Learning By Example - Third Edition

By: Yuxi (Hayden) Liu

Overview of this book

Python Machine Learning By Example, Third Edition serves as a comprehensive gateway into the world of machine learning (ML). With six new chapters, on topics including movie recommendation engine development with Naïve Bayes, recognizing faces with support vector machine, predicting stock prices with artificial neural networks, categorizing images of clothing with convolutional neural networks, predicting with sequences using recurring neural networks, and leveraging reinforcement learning for making decisions, the book has been considerably updated for the latest enterprise requirements. At the same time, this book provides actionable insights on the key fundamentals of ML with Python programming. Hayden applies his expertise to demonstrate implementations of algorithms in Python, both from scratch and with libraries. Each chapter walks through an industry-adopted application. With the help of realistic examples, you will gain an understanding of the mechanics of ML techniques in areas such as exploratory data analysis, feature engineering, classification, regression, clustering, and NLP. By the end of this ML Python book, you will have gained a broad picture of the ML ecosystem and will be well-versed in the best practices of applying ML techniques to solve problems.
Table of Contents (17 chapters)
15
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16
Index

Demystifying neural networks

Here comes probably the most frequently mentioned model in the media, artificial neural networks (ANNs); more often we just call them neural networks. Interestingly, the neural network has been (falsely) considered equivalent to machine learning or artificial intelligence by the general public.

The ANN is just one type of algorithm among many in machine learning. And machine learning is a branch of artificial intelligence. It is one of the ways we achieve general artificial intelligence.

Regardless, it is one of the most important machine learning models and has been rapidly evolving along with the revolution of deep learning (DL). Let's first understand how neural networks work.

Starting with a single-layer neural network

I will first talk about different layers in a network, then the activation function, and finally training a network with backpropagation.

Layers in neural networks

A simple...