Sebastian van Gerwen
Sebastian is a recent graduate of Sydney University, where he studied a Bachelor of Economics and Arts. He thoroughly enjoyed the statistics and econometrics parts of his degree, which motivated him to learn more about data and analytics with the Data School. In his spare time Sebastian enjoys practicing Muay Thai, as well as playing the guitar and the cello.
An Intuitive Guide to Common Machine Learning Models
The sheer number of algorithms and tuneable parameters in machine learning can be daunting to any ML beginner. To create an optimized model requires an understanding of how these algorithms work and the role of each parameter. I will not explain the mathematics behind...
I Built a Neural Network in Alteryx
Yes, the point of this article is in the title. While it is not a particularly useful neural network, it does technically work. You can find the packaged workflow containing the neural network here. Before I continue, however, I feel compelled to include a short...
Tableau Plotting in 3D (with Alteryx)
Before I delve into my method, I should clarify the slight falsification in the title of this blog. Plotting perfectly in three dimensions, in Tableau, is impossible. This is not because of Tableau's limitations, but is a consequence of that fact that computer screens...
Using Table Calculations to Visualise Maths
Like the title and above image suggest, this entry is about using Tableau to visualise maths. And yes, I know that for most people maths is not the most exciting topic. But before you go running for the hills, consider sticking around - visualising mathematical...
Tableau Tricks from my Makeover Monday
I recently built this viz from a makeover Monday dataset of Dark Web product prices. This creation used a few interesting Tableau techniques, so I wanted to share some insights from the creation of this chart. Essentially, I created two rings – an outer ring for...
5 Tips for Running Python in Alteryx
Alteryx provides a streamlined and organised visual system for data processing. It is easy to present to non-software users, runs fast, and has clear tools that when combined can execute powerful data manipulation pipelines. Python is a versatile language that can...
How to Make a Calendar in Tableau
Building out a calendar in Tableau can be an interesting way of presenting information over time, but there are a few quirks that make it more difficult than it may seem. Here is a step-by-step guide to navigating those difficulties and making your Tableau calendar!...
Need a Colour Palette – Use Pokémon!
As someone who is often at a loss when it comes to choosing the right colour palette for a visualisation, I have been told by a few people that Pokémon are actually a good place to start. Whether you use Tableau or other visualisation software, simply load up an image...
How to Arrange Multiple Charts in One Sheet
More specifically, how to arrange a number of charts by dimension as a table instead of as a row. For this example, I am arranging donut charts I made using Tableau's Superstore dataset. Above is the original chart. As you can see (overuse of donut charts aside), the...
Web Scraping The Data School Blogs in Alteryx
Using Alteryx To Decide Whether I Should Blog or Procrastinate... As the second week of my data training rushes by it is high time that I use some of my newfound skills in Alteryx and Tableau to contribute to the Data School’s blog. But alas! I can feel myself...