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

Custom table calculations

Before we move on to some practical examples, let's briefly discuss how to write your own table calculations, instead of using quick table calculations. You can see a list of available table calculation functions by creating a new calculation and selecting Table Calculation from the drop-down list under Functions.

For each of the examples, we'll set Compute Using | Category. This means Department will be the partition.

You can think of table calculations broken down into several categories. The following table calculations can be combined and even nested just like other functions.

Meta table functions

These are the functions that give you information about the partitioning and addressing. These functions also include Index, First, Last, and Size:

  • Index gives an increment as it moves along the addressing within the partition.
  • First gives the offset from the first row in the partition, so the first row in each partition...