Launch, grow, and unlock your career in data

July 31, 2023

#MakeoverMonday 2023 Week 30 - Drinking Fountains in Milan

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In this video, I analyzed the locations of drinking fountains in Milan.

You'll learn about:
  • Joining spatial data sources
  • Parameters
  • Hexbin maps
  • Custom shapes
  • Using mapbox maps
  • Dashboard layout containers
  • Dynamic Zone Visibility
  • Parameter Actions
  • Custom colors
  • Drill down / drill up actions
and more.

Enjoy the video and check out the viz below.

July 25, 2023

The Big Thaw: Exploring the Disappearing Antarctic Sea Ice

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For week 30, we revisited a topic from 2018 week 15 - Arctic sea ice extent. During watch me viz, I focused on rebuilding:

  1. Visualizations from chapter 12 of the Makeover Monday book that showed how to add context to visualizations
  2. Several of the vizzes from 2018 week 15, each with their own unique take on the data
  3. The original viz by The Guardian
In the end, I created 13 visualizations before settling on the viz most similar to the original. There were some great questions today on the livestream. Thank you for that.

When you watch this video, you will definitely learn something new. You'll also learn a lot about how I think through problems when I run into them.

Enjoy! Click on the image below the viz to interact or click here.

18 Ways to Create Bar Charts in Tableau

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In this comprehensive Tableau tutorial, I will explore 18 different ways to create bar charts using Tableau. This video is inspired by Rosa Mariana de Leon-Escribano, my colleague at The Information Lab France.

In this tutorial, I will use various techniques to build bar charts that will help you visualize your data effectively. Whether you are a beginner or an advanced Tableau user, this video is designed to cater to all skill levels.

Throughout the video, I will guide you step-by-step, demonstrating each method so that you can follow along. I will help you understand when to use each type based on your data requirements.

By the end of this tutorial, you will have a solid foundation in creating bar charts in Tableau and be equipped with the knowledge to choose the appropriate bar chart type for your data analysis needs.

Rosa's bar chart catalog - Link  |  My bar chart catalog - Link

July 18, 2023

UNLIMITED Charts, Metrics, and Number Formats in Tableau with Dynamic Zone Visibility

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Dynamic zone visibility opens up so many use cases. Previously, I had to do some number formatting tricks to show two different formats on one chart.

But with DZV, I can create an unlimited number of combinations of charts, metrics, and number formats.

In this video, I show you four examples to get you started. 

Download the workbook here. Interact with it below the video.

July 11, 2023

Mastering Tableau: The Power of Context Filters

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What are Context Filters?

A context filter in Tableau is a powerful feature that allows you to isolate a specific subset of data and create a temporary data subset 

When you apply a context filter to your visualization, Tableau first applies the context filter and then performs calculations and aggregations based on the filtered subset of data.

How do they work?

By creating a context, you can optimize the performance of your visualizations by reducing the amount of data being processed.

When a context filter is applied, Tableau performs the following steps:

  1. Identifies the data that meets the context filter criteria.
  2. Performs calculations and aggregations based on the filtered data.
  3. Evaluates any other filters and calculations based on the context data subset.

A context filter allows you to control the order in which Tableau applies filters and calculations.


In this video, I'll explain:

  1. The difference between regular filters and context filters
  2. How context filters can significantly improve Tableau performance

I'll finish up by showing you a couple of the most common use cases for Context filters to drive the concept home.


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#MakeoverMonday 2023 Week 28 - Global Passport Rankings

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This week's data set only contained one measure, two years, and country names. This meant that I had to focus on charts that help visualize comparisons.

I created:

  1. Grouped bar chart
  2. Bar in bar chart
  3. Grouped bar chart with a gantt bar for the difference
  4. Diverging bar chart
  5. Histogram
  6. Butterfly chart
  7. Barbell chart
  8. Scatter plot
  9. Slope graph
  10. Trellis chart
  11. Jittered bar chart

Wow. I didn't realize I had tried so many chart types. No wonder the hour went by so quickly.

I didn't love any of the charts, so I went with the one that I thought was the best of the bunch. Check it out below the video.

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July 4, 2023

Create 10 ACTIONABLE & IMPACTFUL KPIs in Tableau

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What is a KPI?

KPIs are measurable values that indicate how well a business is performing in achieving its key objectives and goals. They provide a clear and concise snapshot of critical areas within a business.

KPIs help to:

  • Monitor progress

  • Identify areas of improvement

  • Make data-driven decisions

In order to do this, KPIs must be tailored to specific goals and strategies.

Making KPIs Actionable

Here are 8 suggestions to ensure that KPIs are actionable and impactful.

  1. Align with business objectives

  2. Focus on relevance and simplicity

  3. Set measurable targets

  4. Collect accurate and timely data

  5. Visualize your KPIs

  6. Regularly review and update

  7. Add context

  8. Drill down

Actionable KPIs are vital for measuring performance and achieving results. You can drive your business forward by aligning data with goals and simplifying and visualizing KPIs effectively

Read more about KPIs in my newsletter here. Sign up so you don't miss any future newsletters at

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