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 9: Data Cleaning Level I – Cleaning Up the Table

We are finally here! After making sure that we have the required technical skills (part 1 of this book) and analytics skills (part 2 of this book), we can start discussing effective data preprocessing. We will start this journey by looking at data cleaning. This chapter divides data cleaning into three levels: levels I, II, and III. As you move up these levels, learning about the concept of data cleaning will become deeper and more complex. We will talk about what they are, how they are different, and what types of situations require us to perform each level of data cleaning. Furthermore, for each level of data cleaning, we will see examples of data sources that will require different levels of data cleaning.

In this chapter, we will focus on data cleaning level I – cleaning up the table. The next two chapters are also dedicated to data cleaning but at levels II and III.

In this chapter, we're going to...