Book Image

TensorFlow 2.0 Quick Start Guide

By : Tony Holdroyd
Book Image

TensorFlow 2.0 Quick Start Guide

By: Tony Holdroyd

Overview of this book

TensorFlow is one of the most popular machine learning frameworks in Python. With this book, you will improve your knowledge of some of the latest TensorFlow features and will be able to perform supervised and unsupervised machine learning and also train neural networks. After giving you an overview of what's new in TensorFlow 2.0 Alpha, the book moves on to setting up your machine learning environment using the TensorFlow library. You will perform popular supervised machine learning tasks using techniques such as linear regression, logistic regression, and clustering. You will get familiar with unsupervised learning for autoencoder applications. The book will also show you how to train effective neural networks using straightforward examples in a variety of different domains. By the end of the book, you will have been exposed to a large variety of machine learning and neural network TensorFlow techniques.
Table of Contents (15 chapters)
Free Chapter
1
Section 1: Introduction to TensorFlow 2.00 Alpha
5
Section 2: Supervised and Unsupervised Learning in TensorFlow 2.00 Alpha
7
Unsupervised Learning Using TensorFlow 2
8
Section 3: Neural Network Applications of TensorFlow 2.00 Alpha
13
Converting from tf1.12 to tf2

Logistic regression (classification)

This type of problem is confusingly named because regression, as we have seen, implies a continuously valued label, such as the median price of a house, or the height of a tree.

This is not the case with logistic regression. When you have a problem requiring logistic regression, it means that the label is categorical; for example, zero or one, True or False, yes or no, cat or dog, or it may more than two categorical values; for example, red, blue or, green, or one, two, three, four, or five, or the type of a given flower. The labels normally have probabilities associated with them; for example, P(cat=0.92), P(dog=0.08). Thus, logistic regression is also known as classification.

In our next example, we will use logistic regression to predict the category of items of fashion using the fashion_mnist dataset.

Here are a few examples:

Logistic...