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

Example 2 – restructuring the table

In this example, we will use the Customer Churn.csv dataset. This dataset contains the records of 3,150 customers of a telecommunication company. The rows are described by demographic columns such as gender and age, and activity columns such as the distinct number of calls in 9 months. The dataset also specifies whether each customer was churned or not 3 months after the 9 months of collecting the activity data of the customers. Customer churning, from a telecommunication company's point of view, means the customer stops using the company's services and receives the services from the company's competition.

We would like to use box plots to compare the two populations of churning customers and non-churning customers for the following activity columns: Call Failure, Subscription Length, Seconds of Use, Frequency of use, Frequency of SMS, and Distinct Called Numbers.

Let's start by reading the Customer Churn.csv file...