Book Image

Deep Learning with TensorFlow and Keras – 3rd edition - Third Edition

By : Amita Kapoor, Antonio Gulli, Sujit Pal
5 (2)
Book Image

Deep Learning with TensorFlow and Keras – 3rd edition - Third Edition

5 (2)
By: Amita Kapoor, Antonio Gulli, Sujit Pal

Overview of this book

Deep Learning with TensorFlow and Keras teaches you neural networks and deep learning techniques using TensorFlow (TF) and Keras. You'll learn how to write deep learning applications in the most powerful, popular, and scalable machine learning stack available. TensorFlow 2.x focuses on simplicity and ease of use, with updates like eager execution, intuitive higher-level APIs based on Keras, and flexible model building on any platform. This book uses the latest TF 2.0 features and libraries to present an overview of supervised and unsupervised machine learning models and provides a comprehensive analysis of deep learning and reinforcement learning models using practical examples for the cloud, mobile, and large production environments. This book also shows you how to create neural networks with TensorFlow, runs through popular algorithms (regression, convolutional neural networks (CNNs), transformers, generative adversarial networks (GANs), recurrent neural networks (RNNs), natural language processing (NLP), and graph neural networks (GNNs)), covers working example apps, and then dives into TF in production, TF mobile, and TensorFlow with AutoML.
Table of Contents (23 chapters)
21
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Index

K-means clustering

K-means clustering, as the name suggests, is a technique to cluster data, that is, to partition data into a specified number of data points. It is an unsupervised learning technique. It works by identifying patterns in the given data. Remember the sorting hat of Harry Potter fame? What it is doing in the book is clustering—dividing new (unlabelled) students into four different clusters: Gryffindor, Ravenclaw, Hufflepuff, and Slytherin.

Humans are very good at grouping objects together; clustering algorithms try to give a similar capability to computers. There are many clustering techniques available, such as hierarchical, Bayesian, or partitional. K-means clustering belongs to partitional clustering; it partitions data into k clusters. Each cluster has a center, called the centroid. The number of clusters k has to be specified by the user.

The k-means algorithm works in the following manner:

  1. Randomly choose k data points as the initial...