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

Building the revised approach


In this section, we will implement the various ML algorithms, check their precision score, and monitor their learning curve. There is a total of six ML algorithms that will be used to identify which one is the best suited for our application.

Implementing the revised approach

In this section, we will be implementing logistic regression, K-nearest neighbor, decision tree, random forest, Adaboost, and gradient descent. In order to implement this, we will be using the helper class that we built earlier. You can take a look at the code snippet given in the following screenshot:

Figure 3.68: Code snippet for performing training using various ML classifiers

We have already generated a precision score for all the classifiers. We can see random forest and gradient-boosting classifiers with great precision. However, we have still not checked their learning curve. First, we will check their learning curve and then conclude whether any classifier has been facing the over...