Book Image

The Tableau Workshop

By : Sumit Gupta, Sylvester Pinto, Shweta Sankhe-Savale, JC Gillet, Kenneth Michael Cherven
Book Image

The Tableau Workshop

By: Sumit Gupta, Sylvester Pinto, Shweta Sankhe-Savale, JC Gillet, Kenneth Michael Cherven

Overview of this book

Learning Tableau has never been easier, thanks to this practical introduction to storytelling with data. The Tableau Workshop breaks down the analytical process into five steps: data preparation, data exploration, data analysis, interactivity, and distribution of dashboards. Each stage is addressed with a clear walkthrough of the key tools and techniques you'll need, as well as engaging real-world examples, meaningful data, and practical exercises to give you valuable hands-on experience. As you work through the book, you'll learn Tableau step by step, studying how to clean, shape, and combine data, as well as how to choose the most suitable charts for any given scenario. You'll load data from various sources and formats, perform data engineering to create new data that delivers deeper insights, and create interactive dashboards that engage end-users. All concepts are introduced with clear, simple explanations and demonstrated through realistic example scenarios. You'll simulate real-world data science projects with use cases such as traffic violations, urban populations, coffee store sales, and air travel delays. By the end of this Tableau book, you'll have the skills and knowledge to confidently present analytical results and make data-driven decisions.
Table of Contents (12 chapters)
Preface

Introduction

For any visualization, dimensions determine the level at which measures are computed. As an example, consider the following view, in which the sum of profits is calculated based on Country and Region. These two dimensions form the details that are combined to determine the value of SUM(Profit). Now, suppose you remove Region from the view. Then, SUM(Profit) would be re-computed, and would only consider Country in the view. Accordingly, the value of SUM(Profit) changes as the level of the computation changes, as can be seen from the following figure:

Figure 9.1: Understanding LOD

LOD calculations help you control the granularity of visualizations. You can choose to view calculation results at a detailed level, or an aggregated level, based on the LOD function you use, LOD calculations require measures to be aggregated.

In this chapter, you will work with LOD calculations in Tableau.

Throughout these exercises, you will be working with...