Book Image

Learning Tableau 2020 - Fourth Edition

By : Joshua N. Milligan
Book Image

Learning Tableau 2020 - Fourth Edition

By: Joshua N. Milligan

Overview of this book

Learning Tableau strengthens your command on Tableau fundamentals and builds on advanced topics. The book starts by taking you through foundational principles of Tableau. We then demonstrate various types of connections and how to work with metadata. We teach you to use a wide variety of visualizations to analyze and communicate the data, and introduce you to calculations and parameters. We then take an in-depth look at level of detail (LOD) expressions and use them to solve complex data challenges. Up next, we show table calculations, how to extend and alter default visualizations, build an interactive dashboard, and master the art of telling stories with data. This Tableau book will introduce you to visual statistical analytics capabilities, create different types of visualizations and dynamic dashboards for rich user experiences. We then move on to maps and geospatial visualization, and the new Data Model capabilities introduced in Tableau 2020.2. You will further use Tableau Prep’s ability to clean and structure data and share the stories contained in your data. By the end of this book, you will be proficient in implementing the powerful features of Tableau 2020 for decision-making.
Table of Contents (19 chapters)
9
Visual Analytics – Trends, Clustering, Distributions, and Forecasting
17
Other Books You May Enjoy
18
Index

Example of exclude level of detail calculations

Exclude level of detail calculations are useful when you want to perform certain calculations at higher (less detailed) levels than the view level of detail. The following example will demonstrate how we can leverage this functionality.

Average credit score per loan type

In this example, we'll answer the following question: how does the average credit score for a given loan type compare to the overall average for the entire portfolio?

Take the following view, which shows the average credit score per loan type (where loan types are grouped into portfolios):

Figure 5.13: This crosstab shows the average credit score per loan type

What if we wanted to compare the average credit score of each loan type with the overall average credit score for the entire portfolio? We could accomplish this with an exclude level of detail calculation that looks like this:

{EXCLUDE [Loan Type] : AVG([Credit Score])}

This...