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Applied Deep Learning with Keras
Applied Deep Learning with Keras

Applied Deep Learning with Keras: Solve complex real-life problems with the simplicity of Keras

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Profile Icon Ritesh Bhagwat Profile Icon Mahla Abdolahnejad Profile Icon Matthew Moocarme
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R$217.99
Full star icon Full star icon Full star icon Full star icon Half star icon 4.3 (7 Ratings)
Paperback Apr 2019 412 pages 1st Edition
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Arrow left icon
Profile Icon Ritesh Bhagwat Profile Icon Mahla Abdolahnejad Profile Icon Matthew Moocarme
Arrow right icon
R$217.99
Full star icon Full star icon Full star icon Full star icon Half star icon 4.3 (7 Ratings)
Paperback Apr 2019 412 pages 1st Edition
eBook
R$80 R$173.99
Paperback
R$217.99
Subscription
Free Trial
Renews at R$50p/m
eBook
R$80 R$173.99
Paperback
R$217.99
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Free Trial
Renews at R$50p/m

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Applied Deep Learning with Keras

Chapter 2. Machine Learning versus Deep Learning

Note

Learning Objectives

By the end of this chapter, you will be able to:

  • Explain deep learning and how it is different from machine learning

  • Apply linear transformations with Python

  • Build a logistic regression model with Keras

Note

In this chapter, we will learn how deep learning is different from machine learning. We will apply linear transformations and lastly build regression models.

Introduction


In the previous chapter, we discussed some applications of machine learning and even built models with the scikit-learn Python package. In this chapter, we will continue learning how to build machine learning models and extend our knowledge to build an Artificial Neural Network (ANN) with the Keras package. (Remember that ANNs represent a large class of machine learning algorithms that are so called because their architecture resembles the neurons in the human brain.)

Keras is a machine learning library designed specifically for building neural networks. While scikit-learn functionality spans a broader area of machine learning algorithms, the functionality of scikit-learn for neural networks is minimal.

ANNs can be used for the same machine learning tasks as other algorithms that we have encountered, such as logistic regression for classification tasks, linear regression for regression problems, and k-means for clustering. Whenever we begin any machine learning problem, to determine...

Linear Transformations


In this topic, we will introduce linear transformations. Linear transformations are the backbone of modeling with ANNs. In fact, all the processes of ANN modeling can be thought of as a series of linear transformations. The working components of linear transformations are scalars, vectors, matrices, and tensors. Operations such as additions, transpositions, and multiplications are performed on these components.

Scalars, Vectors, Matrices, and Tensors

Scalars, vectors, matrices, and tensors are the actual components of any deep learning model. While they may be simple in principle, having a fundamental understanding of how to utilize all types, as well as the operations that can be performed on them. It is key to the mathematics of ANNs. Scalars, vectors, and matrices are examples of the general entity known as a tensor, so the term tensors may be used throughout this chapter but may refer to any component. Scalars, vectors, and matrices refer to tensors with a specific...

Introduction to Keras


Building ANNs involves creating layers of nodes. Each node can be thought of as a tensor of weights that are learned in the training process. Once the ANN is fitted to the data, a prediction is made by multiplying the input data by the weight matrices layer by layer, applying any other linear transformation when needed, such as activation functions, until the final output layer is reached. The size of each weight tensor is determined by the size of the shape of input nodes and the shape of the output nodes. For example, in a single-layer ANN, the size of our single hidden layer can be thought of as follows:

Figure 2.41: Solving the dimensions of the hidden layer of a single-layer ANN

If the input matrix of features has n rows, or observations, and m columns, or features, and we want our predicted target to have n rows (one for each observation) and 1 column (the predicted value), we can determine the size of our hidden layer by what is needed to make the matrix multiplication...

Summary


In this chapter, we have covered the various types of linear algebra components and operations that pertain to machine learning. The components include scalars, vectors, matrices, and tensors. The operations that were applied to these tensors included addition, transposition, and multiplication, all of which are fundamental for understanding the underlying mathematics of ANNs.

We also learned some basics of the Keras package, including the mathematics that occurs at each node. We also replicated the model from the first chapter, in which we built a logistic regression model to predict the same target from the bank data; however, we used the Keras library to create the model using an ANN instead of the scikit-learn logistic regression model. We achieved a similar level of accuracy using ANNs.

The next chapters in this book will use the same concepts learned in this chapter; however, we will continue building ANNs with the Keras package. We will extend our ANNs to more than a single...

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Key benefits

  • Solve complex machine learning problems with precision
  • Evaluate, tweak, and improve your deep learning models and solutions
  • Use different types of neural networks to solve real-world problems

Description

Though designing neural networks is a sought-after skill, it is not easy to master. With Keras, you can apply complex machine learning algorithms with minimum code. Applied Deep Learning with Keras starts by taking you through the basics of machine learning and Python all the way to gaining an in-depth understanding of applying Keras to develop efficient deep learning solutions. To help you grasp the difference between machine and deep learning, the book guides you on how to build a logistic regression model, first with scikit-learn and then with Keras. You will delve into Keras and its many models by creating prediction models for various real-world scenarios, such as disease prediction and customer churning. You’ll gain knowledge on how to evaluate, optimize, and improve your models to achieve maximum information. Next, you’ll learn to evaluate your model by cross-validating it using Keras Wrapper and scikit-learn. Following this, you’ll proceed to understand how to apply L1, L2, and dropout regularization techniques to improve the accuracy of your model. To help maintain accuracy, you’ll get to grips with applying techniques including null accuracy, precision, and AUC-ROC score techniques for fine tuning your model. By the end of this book, you will have the skills you need to use Keras when building high-level deep neural networks.

Who is this book for?

If you have basic knowledge of data science and machine learning and want to develop your skills and learn about artificial neural networks and deep learning, you will find this book useful. Prior experience of Python programming and experience with statistics and logistic regression will help you get the most out of this book. Although not necessary, some familiarity with the scikit-learn library will be an added bonus.

What you will learn

  • Understand the difference between single-layer and multi-layer neural network models
  • Use Keras to build simple logistic regression models, deep neural networks, recurrent neural networks, and convolutional neural networks
  • Apply L1, L2, and dropout regularization to improve the accuracy of your model
  • Implement cross-validate using Keras wrappers with scikit-learn
  • Understand the limitations of model accuracy
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Length: 412 pages
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Table of Contents

9 Chapters
Introduction to Machine Learning with Keras Chevron down icon Chevron up icon
Machine Learning versus Deep Learning Chevron down icon Chevron up icon
Deep Learning with Keras Chevron down icon Chevron up icon
Evaluate Your Model with Cross-Validation using Keras Wrappers Chevron down icon Chevron up icon
Improving Model Accuracy Chevron down icon Chevron up icon
Model Evaluation Chevron down icon Chevron up icon
Computer Vision with Convolutional Neural Networks Chevron down icon Chevron up icon
Transfer Learning and Pre-Trained Models Chevron down icon Chevron up icon
Sequential Modeling with Recurrent Neural Networks Chevron down icon Chevron up icon

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Emmanuel Oppong-Sarpong Jan 11, 2024
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Udemy Verified review Udemy
Rohit Garg Oct 24, 2023
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Untoro Oct 17, 2023
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Deepak Tripathy Nov 09, 2022
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It is a very underrated course on Udemy it seems. It is indeed a very good course on application of Keras in applying deep learning to analyze data. I am glad that this course doesn't go deep into the mathematics side of things as some deep learning courses tend to do. Although it is good and essential to understand the mathematics behind concepts such as activation and back-propagation, but in practical world it is important to know how to apply deep learning algorithms quickly using tools like TensorFlow, Keras etc. This course practically explains the application of Keras using a hands-on coding approach. The exercises are good too. The only problematic thing is the low quality audio which should be improved and some of the captions are also incorrect. I would definitely check out other courses by Packt.. Thanks
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Nedim May 05, 2020
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