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

The best approach


In this section, we are trying to build the best possible recommendation engine. There are two parts to this section:

  • Understanding the key concepts

  • Implementing the best approach

Our first part covers the basic concepts, such as how the CF and KNN algorithms work, what kind of features we need to choose, and so on. In the second part, we will be implementing the recommendation engine using the KNN and CF algorithm. We will generate the accuracy score as well as the recommendation for books. So let's begin!

Understanding the key concepts

In this section, we will understand the concepts of collaborative filtering. This covers a lot of aspects of the recommendation system. So, let's explore CF.

Collaborative filtering

There are two main types of collaborative filtering, as follows:

  • Memory-based CF:

    • User-user collaborative filtering

    • Item-item collaborative filtering

  • Model-based CF:

    • Matrix-factorization-based algorithms

    • Deep learning

We will begin with memory-based CF and then move on to...