Viewing posts by christian
COVID-19 Quarantine House: Hollywood Walk of Fame Edition
Posted by: christian on 9 Apr 2020
To find your Hollywood Walk of Fame Quarantine house, use this script on the command line, providing your latitude and longitude:
Illustrating the Padovan sequence
Posted by: christian on 8 Apr 2020
The Padovan sequence is a cousin of the more famous Fibonacci sequence defined by the initial values $P(1)=P(2)=P(3)=1$ and the recurrence relation $P(n) = P(n-2) + P(n-3)$. That is, the next value is obtained not by summing the previous two values but by summing the two values before the last one. The first few values are:
Plotting COVID-19 case growth charts
Posted by: christian on 29 Mar 2020
Following on from this previous post, here is a short tutorial on creating this and similar charts using pandas by automatically downloading data from Johns Hopkins University's CSSE GitHub repository (the "JHU/CSSE dataset").
Plotting COVID-19 cases
Posted by: christian on 27 Mar 2020
The Centre for Systems Science and Engineering (CSSE) at Johns Hopkins University publishes daily statistics of the number of confirmed cases of COVID-19 by country on its GitHub page. The short script below pulls data from this page to plot a bar chart of cases and growth in cases as a function of time for a given country. For example:
The Trapped Knight
Posted by: christian on 26 Mar 2020
The Trapped Knight problem is a chess-based problem apparently invented by Neil Sloane and giving rise to a finite number sequence in his Online Encyclopedia of Integer Sequences (OEIS A316667).