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.
Learning Machine Learning – A Beginner’s Guide
Last week, I achieved a machine learning milestone I have been working towards for the last six months - I came in the top 10 (6th place) of Kaggle's April Tabular Playground Series competition. This competition pits ML practitioners together on simulated tabular data...
Dashboard Week Day 5 – Melbourne Census Data
It's the final day of dashboard week! Today there was no particular challenge - just make a dashboard! Our data was the Melbourne Census of Land Use and Employment (CLUE) data. And wow, is this data big! It has land use and demographic data from over 10000 properties...
Dashboard Week Day 4 – Formula One
I write this blog at the end of the second-last day of dashboard week. Only one more day (and dashboard) to go! Today’s challenge was formula one data from here. This was particularly challenging to me because I have absolutely no knowledge whatsoever about formula...
Dashboard Week Day 3 – Plane Crash Data
Dashboard week is more than halfway over! Today’s challenge was building a dashboard from web-scraped plane crash data. While the format of the website was simple, some unforeseen challenges made the web-scraping process much more difficult than I thought it would be....
Dashboard Week Day 2 – Whiskey Hunter API
Although today’s focus was on loading data from API, the Whiskey Hunter API that we used was simple. Connecting to the API and downloading all available data was no problem for this week. Instead, this blog will focus on my main area of difficulty in designing the...
Dashboard Week Day One – Australian Charities
Dashboard week has begun! To begin, we are looking at data from the ACNC Australian registered charities and non-for-profit commission. This week's biggest challenge was finding a story in the relatively sparse data. The majority of the data is dummy variables that...
A Visual Glossary of The Data School Blogs
Throughout my Data School training, the blogs of other Data Schoolers have been a hugely important resource. There exists a data school blog that will answer almost any Tableau or Alteryx development question, as well as vast numbers of other data-analytics resources....
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...