#### Overview of this book

Learning Tableau 10 Second Edition
Credits
www.PacktPub.com
Preface
Free Chapter
Creating Your First Visualizations and Dashboard
Working with Data in Tableau
Moving from Foundational to More Advanced Visualizations
Using Row-Level, Aggregate, and Level of Detail Calculations
Table Calculations
Formatting a Visualization to Look Great and Work Well
Telling a Data Story with Dashboards
Deeper Analysis – Trends, Clustering, Distributions, and Forecasting
Making Data Work for You
Advanced Visualizations, Techniques, Tips, and Tricks

## Comparing values across different dimensions

More often than not, you will want to compare the differences of measured values across different categories. You might find yourself asking questions like this:

• How much profit did we generate in each department?

• How many views did each web page get?

• How many patients did each doctor see?

In each case, you are looking to make a comparison (among departments, websites, or doctors) in terms of some quantitative measurement (profit, number of views, and count of patients).

### Bar charts

The following figure is a simple bar chart, similar to the one we built in Chapter 1, Creating Your First Visualizations and Dashboards:

The sum of sales is compared for each category of item sold in the chain of stores. Category is used as a discrete dimension in the view, which defines row headers (because it is discrete) and slices the sum of sales for each category (because it is a dimension). Sales defines an axis (because it is continuous) and is summed (because it...