Book Image

Hands-On Data Preprocessing in Python

By : Roy Jafari
5 (2)
Book Image

Hands-On Data Preprocessing in Python

5 (2)
By: Roy Jafari

Overview of this book

Hands-On Data Preprocessing is a primer on the best data cleaning and preprocessing techniques, written by an expert who’s developed college-level courses on data preprocessing and related subjects. With this book, you’ll be equipped with the optimum data preprocessing techniques from multiple perspectives, ensuring that you get the best possible insights from your data. You'll learn about different technical and analytical aspects of data preprocessing – data collection, data cleaning, data integration, data reduction, and data transformation – and get to grips with implementing them using the open source Python programming environment. The hands-on examples and easy-to-follow chapters will help you gain a comprehensive articulation of data preprocessing, its whys and hows, and identify opportunities where data analytics could lead to more effective decision making. As you progress through the chapters, you’ll also understand the role of data management systems and technologies for effective analytics and how to use APIs to pull data. By the end of this Python data preprocessing book, you'll be able to use Python to read, manipulate, and analyze data; perform data cleaning, integration, reduction, and transformation techniques, and handle outliers or missing values to effectively prepare data for analytic tools.
Table of Contents (24 chapters)
1
Part 1:Technical Needs
6
Part 2: Analytic Goals
11
Part 3: The Preprocessing
18
Part 4: Case Studies

Chapter 13: Data Reduction

We have come to yet another important step of data preprocessing that is not concerned with data cleaning; this is known as data reduction. To successfully perform analytics, we need to be able to recognize situations where data reduction is necessary and know the best techniques and the how-to of their implementation. In this chapter, we will learn what data reduction is. Let's put this another way: we will learn what the data pre-processing steps are that we call data reduction. Furthermore, we will cover the major reasons and objectives of data preprocessing. Most importantly, we will look at a categorized list of data reduction tools and learn what they are, how they can help, and how we can use Python to implement them.

In this chapter, we are going to cover the following main topics:

  • The distinction between data reduction and data redundancy
  • Types of data reduction
  • Performing numerosity data reduction
  • Performing dimensionality...