A Butterfly Chart is (typically) a bar chart where two sets of data series are displayed side by side. The purpose is to allow you to compare the two data series across a dimension. 

Here is an example of a butterfly chart I created for Makeover Monday.

Notice how I have zero at the center and the scales are the same on either side of zero. This helps show how the chart "leans" to one side or the other.

The comparisons would be more difficult to see if the left and right hand sides of the butterfly did not have the same axis scale. In this video, I show you how two examples for creating a butterfly chart.

In a recent Makeover Monday #WatchMeViz, I showed how to create a bar chart to compare two measures and then add a candlestick chart as well to show the difference between the two measures. It's actually quite simple; it requires some knowledge of:

1. How Measure Names and Measure Values work together
2. How to create a combined axis chart
3. How to create a dual axis chart
4. How to create a Gantt chart

Today's Makeover Monday marked my 1,000th viz published to Tableau Public. I must say that I'm pretty proud of myself. This feels like a pretty big milestone in my career. I wonder how many hours I've spent using Tableau in my life.

Thank you for all of your support and encouragement along the way. Tableau wouldn't be anything without the Community.

Let's get to week 47. The visualization comes from Visual Capitalist.

• The bar/line combination charts work well since they are on the same scale. This also makes them easier to distinguish.
• Choosing colors that match the American flag (I'm assuming that was intentional)
• Making 2020 a slightly different shade of red
• Title is clear
• Text callouts add useful context
• Big numbers to show the most recent values

Twice recently I've used parameter actions to create a single column drill down and drill up to mimic a hierarchy. 

1. HR Analytics KPI Dashboard (Viz • Blog post)
2. Makeover Monday Week 46 (Viz • Blog post)

Venn diagrams (also called Set diagrams or Logic diagrams) use overlapping circles to illustrate the logical relationships between two or more sets of items. They depict how things relate to each other within a particular segment. 

For example, how many customers made purchases in the East region, in the West region, and in both regions? 

Where the circles overlap, you display text or a value the represents the value associated with the relationship.

I created a Venn diagram for my Visual Vocabulary and while teaching how to create it, I thought of a much simpler way to create them. All of the versions you see online (and the version in the Visual Vocabulary) require you to:

1. Create sets
2. Evaluate how many things are in each set as an aggregate
3. Align the circles according to these values
4. Create a calc to display the text for the overlap with a computed set

For #MakeoverMonday week 43 we analyzed data about apparel exports to the US during the Coronavirus pandemic. In this session of #WatchMeViz, I showed 28 different ways to visualize time series data (there are way more) before we all settled on a viz that's basically the same as the original and looks nicer.

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Show Notes / References:

1. Data Set - https://data.world/makeovermonday/2020w43-apparel-exports-to-us
2. Tableau Reference Guide (incredible repository of thousands of Tableau tips) by Jeffrey Shaffer - http://www.tableaureferenceguide.com/
3. How to Shade Between Two Lines with Polygons by Rody Zakovich - http://www.datatableauandme.com/2017/08/how-to-shade-between-2-lines-in-tableau.html
4. Title Capitalization - https://capitalizemytitle.com/