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

Understanding the testing matrix


In this section, we will look at the testing matrix for the facial emotion application. The concept of testing is really simple. We need to start observing the training steps. We are tracking the values for loss and accuracy. Based on that, we can decide the accuracy of our model. Doesn't this sound simple? We have trained the model for 30 epochs. This amount of training requires more than three hours. We have achieved 63.88% training accuracy. Refer to the code snippet in the following diagram:

Figure 10.34: Training progress for getting an idea of training accuracy

This is the training accuracy. If we want to check the accuracy on the validation dataset, then that is given in the training step as well. We have defined the validation set. With the help of this validation dataset, the trained model generates its prediction. We compare the predicted class and actual class labels. After that, we generate the validation accuracy that you can see in the preceding...