Book Image

Deep Learning with R for Beginners

By : Mark Hodnett, Joshua F. Wiley, Yuxi (Hayden) Liu, Pablo Maldonado
Book Image

Deep Learning with R for Beginners

By: Mark Hodnett, Joshua F. Wiley, Yuxi (Hayden) Liu, Pablo Maldonado

Overview of this book

Deep learning has a range of practical applications in several domains, while R is the preferred language for designing and deploying deep learning models. This Learning Path introduces you to the basics of deep learning and even teaches you to build a neural network model from scratch. As you make your way through the chapters, you’ll explore deep learning libraries and understand how to create deep learning models for a variety of challenges, right from anomaly detection to recommendation systems. The Learning Path will then help you cover advanced topics, such as generative adversarial networks (GANs), transfer learning, and large-scale deep learning in the cloud, in addition to model optimization, overfitting, and data augmentation. Through real-world projects, you’ll also get up to speed with training convolutional neural networks (CNNs), recurrent neural networks (RNNs), and long short-term memory networks (LSTMs) in R. By the end of this Learning Path, you’ll be well-versed with deep learning and have the skills you need to implement a number of deep learning concepts in your research work or projects.
Table of Contents (23 chapters)
Title Page
Copyright and Credits
About Packt
Contributors
Preface
Index

Chapter 6. Tuning and Optimizing Models

In the last two chapters, we trained deep learning models for classification, regression, and image recognition tasks. In this chapter, we will discuss some important issues in regard to managing deep learning projects. While this chapter may seem somewhat theoretical, if any of the issues discussed are not correctly managed, it can derail your deep learning project. We will look at how to choose evaluation metrics and how to create an estimate of how well a deep learning model will perform before you begin modeling. Next, we will move onto data distribution and the mistakes often made in splitting data into correct partitions for training. Many machine learning projects fail in production use because the data distribution is different to what the model was trained with. We will look at data augmentation, a valuable method to enhance your model's accuracy. Finally, we will discuss hyperparameters and learn how to tune them.

In this chapter, we will...