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

Testing the baseline model


Here, we will look at the code snippet that performs the actual testing. We will be obtaining all the testing matrices that have been explained so far. We are going to test all the different ML algorithms so that we can compare the accuracy score.

Testing of Multinomial naive Bayes

You can see the testing result for the multinomial naive Bayes algorithm in the following figure:

Figure 5.9: Code snippet for testing multinomial naive Bayes algorithm

As you can see, using this algorithm we have achieved an accuracy score of 81.5%.

Testing of SVM with rbf kernel

You can see the testing result for SVM with the rbf kernel algorithm in the following figure:

Figure 5.10: Code snippet for testing SVM with rbf kernel

As you can see, we have performed a test on the testing dataset and obtained an accuracy of 65.4%.

Testing SVM with the linear kernel

You can see the testing result for SVM with the linear kernel algorithm in the following figure:

Figure 5.11: Code snippet for testing...