charlie park

A New Focus

I’ve rebooted this site many times in the last decade or so. I’m trying it again. Read more

BART to SFO

Optimizing the trip to SFO. Read more

Santa Is A Game People Play

How we did Christmas. It worked out pretty well. Read more

A Slopegraph Update

The response to my original slopegraphs post blew me away. The post was linked to by Edward Tufte himself, by John Gruber and Jason Kottke, was the #1 post on Hacker News for several hours, was on MetaFilter, and saw a massive amount of activity on Twitter. I also learned a great deal from the data visualization community afterwards, and I wanted to write a follow-up, to share what I learned. Read more

Edward Tufte’s “Slopegraphs”

I researched a data visualization approach that had been largely forgotten, and wrote this article. It was widely read, and that visualization technique — the “slopegraph” — became far more popular, and is now regularly seen in sources like the New York Times, the Financial Times, the Washington Post, and other media. Read more