Book Image

Machine Learning Solutions

Book Image

Machine Learning Solutions

Overview of this book

Machine learning (ML) helps you find hidden insights from your data without the need for explicit programming. This book is your key to solving any kind of ML problem you might come across in your job. You’ll encounter a set of simple to complex problems while building ML models, and you'll not only resolve these problems, but you’ll also learn how to build projects based on each problem, with a practical approach and easy-to-follow examples. The book includes a wide range of applications: from analytics and NLP, to computer vision domains. Some of the applications you will be working on include stock price prediction, a recommendation engine, building a chat-bot, a facial expression recognition system, and many more. The problem examples we cover include identifying the right algorithm for your dataset and use cases, creating and labeling datasets, getting enough clean data to carry out processing, identifying outliers, overftting datasets, hyperparameter tuning, and more. Here, you'll also learn to make more timely and accurate predictions. In addition, you'll deal with more advanced use cases, such as building a gaming bot, building an extractive summarization tool for medical documents, and you'll also tackle the problems faced while building an ML model. By the end of this book, you'll be able to fine-tune your models as per your needs to deliver maximum productivity.
Table of Contents (19 chapters)
Machine Learning Solutions
Foreword
Contributors
Preface
Index

Implementing the basic version of the gaming bot


In this section, we will be implementing a simple game. I have already defined the rules of this game. Just to remind you quickly, our agent, yellow block tries to reach either the red block or the green block. If the agent reaches the green block, we will receive + 1 as a reward. If it reaches the red block, we get -1. Each step the agent will take will be considered a - 0.04 reward. You can turn back the pages and refer to the section Rules for the game if you want. You can refer to the code for this basic version of a gaming bot by referring to this GitHub link: https://github.com/jalajthanaki/Q_learning_for_simple_atari_game.

For this game, the gaming world or the gaming environment is already built, so we do not need to worry about it. We need to include this gaming world by just using the import statement. The main script that we are running is Lerner.py. The code snippet for this code is given in the following screenshot:

Figure 11.8...