August 14, 2025
How to Clean Messy Data in Tableau in Seconds!
In this tutorial, I’ll show you how to use Tableau’s Data Interpreter to clean up a messy dataset in seconds. You’ll learn how to automatically remove unnecessary headers, fix field names, and get your data ready for analysis.
Then, we’ll take that cleaned data and build a Population Pyramid from scratch — perfect for visualizing demographic distributions like age and gender.
You’ll learn:
• How Tableau’s Data Interpreter works and when to use it
• Tips for cleaning data quickly without leaving Tableau
• Step-by-step instructions to create a Population Pyramid
• How to make your visualization clear and easy to read
Whether you’re a beginner or an experienced Tableau user, this video will help you save time, clean your data, and create a chart that impresses stakeholders.
📚 RESOURCES
Data (from ONS)
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August 6, 2025
Tableau Tutorial for Beginners (2025)
Want to learn Tableau fast?
Start with this beginner-friendly tutorial where I'll show you how to import data, clean it, build your first interactive dashboard, and share your dashboard—all using Tableau Desktop.
📚 RESOURCES• 📂 Sample Excel file to follow along (thanks Kevin Stratvert)
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• Mastering Containers
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July 31, 2025
How to Create Hexbin Scatterplots in Tableau
Want to get better at Tableau?
July 24, 2025
How to Add Two Values to One Parameter in Tableau
March 19, 2025
How to Analyze Customer Retention with a Jump Plot
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Connect sales data source to 180 points and relate “1” to “1”
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Compute Min Date by customer
{ FIXED [Customer Name] : MIN([Purchase Date]) }
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Compute the Max Date by Customer
{ FIXED [Customer Name] : MAX([Purchase Date]) }
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Filter customers that made more than one order (Max Date > Min Date)
[Max Date]>[Min Date]
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Create Customer Length calc
DATEDIFF('day',[Min Date],[Max Date])
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Create Columns calc (continuous dimension)
DATE( ((COS([Point] * PI() / 180)) + 1 ) * (FLOAT([Max Date])-FLOAT([Min Date])) / 2 + FLOAT([Min Date]) )
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Create Rows calc (continuous dimension)
SIN((MIN([Point])) * PI() / 180) * SUM([Sales])
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Add Columns and Rows to viz
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Add Customer to Detail
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Add Path to Path
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Create Profitable calc and add to Color
{ FIXED [Customer Name] : SUM([Profit])}>0
February 20, 2025
How to Create a Multi Column Dot Plot
February 12, 2025
Advanced Calendar Heat Maps in Tableau (No More Workarounds!)
February 4, 2025
How to Exclude Reference Lines from Grand Totals in Tableau
Ever added a reference line to your Tableau visualization, only to see it appear in the grand total row, even when it doesn’t make sense?
If your grand total uses a different aggregation than your main data (e.g., SUM vs. AVG), the reference line can be misleading.
Unfortunately, Tableau doesn’t offer a simple way to exclude it—but there’s a trick to removing it while keeping your totals visible.
In the video below, I’ll walk you through the step-by-step solution to remove reference lines from grand totals.
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