This one is a plot of when I first saw someone play a game (in blue) and when I last saw them play a game (in green) (all values plotted are the cumulative values).
All this shows is that I see new people when my data begins, and I stop seeing people after my data ends (aka, time is a thing).
The real purpose of this post is to share all my code so far. Its all in ipython notebook (see http://jupyter.org/) files (thats how I did the dev), and is attached. Also included is all the raw data, so knock yourselves out.
Source : https://forums.faforever.com/viewtopic.php?f=2&t=13449#p138933