Stephen Wolfram analyzes some of the data he has been collecting about himself over many years:
But even though I’ve been accumulating data for years—and always meant to analyze it—I’ve never actually gotten around to doing it. But withMathematica and the automated data analysis capabilities we just released in Wolfram|Alpha Pro, I thought now would be a good time to finally try taking a look—and to use myself as an experimental subject for studying what one might call “personal analytics”….
Another kind of data that I’ve been collecting is keystrokes. For many years, I’ve captured every keystroke I’ve typed—now more than 100 million of them:
There are all kinds of detailed facts to extract: like that the average fraction of keys I type that are backspaces has consistently been about 7% (I had no idea it was so high!)….
(Thanks to investigator Ed Pegg for bringing this to our attention.)