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 Pong gaming bot


These are the implementation steps that we need to follow:

  • Initialization of the parameters

  • Weights stored in the form of matrices

  • Updating weights

  • How to move the agent

  • Understanding the process using NN

You can refer to the entire code by using this GitHub link: https://github.com/jalajthanaki/Atari_Pong_gaming_bot.

Initialization of the parameters

First, we define and initialize our parameters:

  • batch_size: This parameter indicates how many rounds of games we should play before updating the weights of our network.

  • gamma: This is the discount factor. We use this to discount the effect of old actions of the game on the final result.

  • decay_rate: This parameter is used to update the weight.

  • num_hidden_layer_neurons: This parameter indicates how many neurons we should put in the hidden layer.

  • learning_rate: This is the speed at which our gaming agent learns from the results so that we can compute new weights. A higher learning rate means we react more strongly to results...