Book Image

Hands-On Reinforcement Learning with Python

By : Sudharsan Ravichandiran
Book Image

Hands-On Reinforcement Learning with Python

By: Sudharsan Ravichandiran

Overview of this book

Reinforcement Learning (RL) is the trending and most promising branch of artificial intelligence. Hands-On Reinforcement learning with Python will help you master not only the basic reinforcement learning algorithms but also the advanced deep reinforcement learning algorithms. The book starts with an introduction to Reinforcement Learning followed by OpenAI Gym, and TensorFlow. You will then explore various RL algorithms and concepts, such as Markov Decision Process, Monte Carlo methods, and dynamic programming, including value and policy iteration. This example-rich guide will introduce you to deep reinforcement learning algorithms, such as Dueling DQN, DRQN, A3C, PPO, and TRPO. You will also learn about imagination-augmented agents, learning from human preference, DQfD, HER, and many more of the recent advancements in reinforcement learning. By the end of the book, you will have all the knowledge and experience needed to implement reinforcement learning and deep reinforcement learning in your projects, and you will be all set to enter the world of artificial intelligence.
Table of Contents (16 chapters)

Playing Doom with a Deep Recurrent Q Network

In the last chapter, we saw how to build an agent using a Deep Q Network (DQN) in order to play Atari games. We have taken advantage of neural networks for approximating the Q function, used the convolutional neural network (CNN) to understand the input game screen, and taken the past four game screens to better understand the current game state. In this chapter, we will learn how to improve the performance of our DQN by taking advantage of the recurrent neural network (RNN). We will also look at what is partially observable with the Markov Decision Process (MDP) and how we can solve that using a Deep Recurrent Q Network (DRQN). Following this, we will learn how to build an agent to play the game Doom using a DRQN. Finally, we will see a variant of DRQN called Deep Attention Recurrent Q Network (DARQN), which augments the attention...