The Data School Blog
How to Create a Donut Chart in Tableau
Donut charts are a great alternative to pie charts as they offer a cleaner visual layout, creating a useful white space in the center that can be used to display key insights, totals or additional context. Since Tableau doesn't have a built-in donut chart type, I'll...
Thursday Dashboard Week Challenge
Introduction It’s day 4 for dashboard week. There have been many trials and tribulations to overcome. None that I may forget, yet has reforged my comprehension, enthusiasm and skill set for developing comprehensive dashboards, especially under time sensitive...
My Four-Month Training Journey
The Early Weeks Early on in the training, we were introduced to Tableau, Power BI, Alteryx, and SQL. Most days generally start off by covering the basics, working out something like x + y, and I'd remember thinking to myself 'okay, this is easy'. But fast forward to...
Dashboard Week- Day 5: How Indian Regions are Represented by IMBd
Dataset Finally, the grand finale is upon us, the last dashboard of the week and thankfully it was data from a source that was immediately recognizable to all movie buffs! myself included the IMDb database. This dataset was primarily based on IMDb’s non-commercial...
Love And Outliers
From the “Data but Make it Personal” series – Part 8 When the Data Doesn’t Make Sense (But Matters Most) In every dataset, there are outliers — values that don’t follow the trend, don’t fit the model, don’t behave the way you expect. Analysts are trained to spot them,...
Data Models: Where It All Comes Together
From the “Data but Make it Personal” series – Part 6 Why good design makes great dashboards possible I love a beautiful dashboard. A clean layout, the right colors, interactive filters, the magic of seeing a story unfold visually — it’s one of the things that...
The Smart Way to Swap Sheets: Tableau’s Dynamic Zone Visibility
There are times when a dashboard tries to do too much at once. There are filters, charts, KPIs and legends all in the view at the same time, driving the audience to visualisation paralysis. It can become cluttered and confusing. Sometimes to avoid this we end up over...
Reflecting on my Interview Viz – Four Months Later
To get into the Data School, you're asked to create a Tableau visualisation using a provided dataset and present it during the interview, explaining your story and key insights that you uncovered. Now with my four months of training coming to an end, I wanted to take...
Tableau Pareto Chart: Identify Key Contributors With One Powerful Visual
Welcome to my tutorial on Pareto Charts. This tutorial will demonstrate step by step how to create a Pareto chart. As you follow along you can watch and listen to my demonstration in parts or scroll down to the bottom of the page and watch the full recording in one...
Dashboard Week- Day 4: Evolution of Crosswords
Dataset For my fourth viz of Dashboard Week, we were handed quite a complex dataset all about crossword puzzles over the years. Not something I ever thought I’d analyse, but it was surprisingly fun. The data was scrapped and loaded into .csv files and some of them...
Dashboard Week- Day 3: National Electronic Injury Surveillance System (NEISS)
Dataset For this dashboard challenge, we were given injury data in U.S from the NEISS (National Electronic Injury Surveillance System) dataset. I worked with six Excel files covering 2019 to 2024, each containing thousands of records on emergency department visits....
Dashboard Week – Day 2: A Shot at NCAA Basketball Strategy
Dataset For the second Viz of the dashboard week we were tasked to hit up the Google cloud’s big query database on NCAA basketball. There were multiple tables within this database, and we were warned not to go down the rabbit hole of trying to bring through all the...