I was curious if my sleeping/waking habits had really changed over the years – I definitely don’t feel I work as late now as when I was 22, but it’s hard to tell. To test this, I looked over all of the timestamps of mail I’ve sent in the past few years and tried to make a pretty graph.

I’m not sure how meaningful it is, but thanks to ggplot, it is pretty, at least.

The plotting code is straightforward — try it out!