September 2018
River Map of South Africa
The South African subreddit has some useful material about the country, such as this river map from Sukhmani Mantel.
Limn: notes on data visualisation
Posts about charts, maps and the data behind them, with a general focus on South Africa and African data. The newest note is first.
February 2018
Ant Graphs
A picture of how ant colony trails look and change over time, and why it makes a good model for an interactive map.
February 2018
D3 v4 in Jupyter Notebooks
Getting data from Spark into D3 is quick with Jupyter, which has solid pyspark support. A notebook shows how it works.
January 2018
Two neurons are riding a bicycle
What it looks like when you simulate pushing a bicycle and let it fall over. 800 times.
November 2017
PSL Analysis from 2002 to Current Season
A guest post from Sbusiso Mkhondwane: every Premier Soccer League result since 2002, analysed in R.
August 2017
Peak Rationality
The first of a series of semi-weekly visualisations: a depiction of a thought, drawn when time and inspiration coincide.
March 2017
Seeing Theory
Really awesome work for anyone who has studied statistics and wanted a better visual explanation. D3 based too.
February 2017
2016 Berlin Marathon Data Visualisation
A good marathon data visualisation, built on PixiJS, that shows the spread of the whole field.
February 2017
2 Years of Running Visualised
Two years of running in the same area, overlaid into one animation from a reddit post.
October 2016
The Hard Problem of Data Analytics in Africa
Technology that hides complexity is good until the output can be wrong. Why big data tools need people who know the data.
August 2016
One Year of Comrades Training
The training year of 1030 runners who completed the Comrades Marathon, drawn as one row each.
January 2016
Welcome to Limn
Limn (verb): depict or describe in painting or words. Also: this site, dedicated to the art of data visualisation.