A chart for marathoners

Here's a cool application of calendar heat maps: runner Andy used R to catalogue his daily running mileage over the last 2+ years:

There are lots of ways to chart data like this (a simple time-series chart, for example), but sometimes looking at data in new ways offers fresh perspectives. For example, Andy notes: "Apparently I missed running on a lot of Saturday’s at one point. Most likely in the fall when my college football team had a home game."

And while we're talking about calendar heat maps: here's an implementation in D3.js.

ProcRun: What 5,728.986 miles look like…