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

Adding visual dimensions

The visualizations that we have created so far have only two dimensions. When using data visualization as a way to tell a story or share findings, there are many good reasons not to add too many dimensions to your visuals. For instance, visuals that have too many dimensions may overwhelm your audience. However, when the visuals are used as exploratory tools to detect patterns in the data, being able to add dimensions to the visuals might be just what a data analyst needs.

There are many ways to add dimensions to a visual, such as using color, size, hue, line styles, and more. Here, we will cover the three most applied approaches by adding dimensions using color, size, and time. In this case, we will show adding the dimensions for the case of scatter plots, but the techniques shown can be easily extrapolated to other visuals if applicable. The following example demonstrates how adding extra dimensions to the scatter plot could be of significant value.

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