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Tableau Prep Cookbook

You're reading from   Tableau Prep Cookbook Use Tableau Prep to clean, combine, and transform your data for analysis

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Product type Paperback
Published in Mar 2021
Publisher Packt
ISBN-13 9781800563766
Length 288 pages
Edition 1st Edition
Tools
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Author (1):
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Hendrik Kleine Hendrik Kleine
Author Profile Icon Hendrik Kleine
Hendrik Kleine
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Table of Contents (11) Chapters Close

Preface 1. Chapter 1: Getting Started with Tableau Prep 2. Chapter 2: Extract and Load Processes FREE CHAPTER 3. Chapter 3: Cleaning Transformations 4. Chapter 4: Data Aggregation 5. Chapter 5: Combining Data 6. Chapter 6: Pivoting Data 7. Chapter 7: Creating Powerful Calculations 8. Chapter 8: Data Science in Tableau Prep Builder 9. Chapter 9: Creating Prep Flows in Various Business Scenarios 10. Other Books You May Enjoy

Creating regular expressions in calculations

In this chapter, we've seen how to extract substrings already. In this brief recipe, we're going to explore another method of doing so, using regular expressions. Regular expressions, also referred to as regex, allow you to define a complex search pattern to locate, and in our case extract, substrings. A look at the inner workings of regex is beyond the scope of this book, but a quick web search will reveal numerous sources including example regex statements. In Tableau Prep, you can leverage such statements in a REGEX function.

Getting ready

To follow along with this recipe, download the Sample Files 7.6 folder from this book's GitHub repository. There, you'll find the Missed Chats.csv Excel file. In this file, we find a log of users who have visited our company website and attempted to contact us via live chat when no agent was available to respond. At that point, they submitted their details in a contact form...

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