Back in September 2012, when Firefox was at version 15 and Emacs at version 24.2, I asked When will Firefox overtake Emacs?
I used R (all the code is included in the post) to generate this chart:
I said, “I don’t know how to extract the range where the lines collide, but it looks like in late 2013 Firefox will overtake Emacs with a version number at or under 25.”
Let’s see how it turned out by looking at current data. Firefox is at 26 now, and Emacs at 24.3.
Here we see Firefox higher on the y-axis, because of its higher version number:
Now we add regression predicting the future of Emacs:
Firefox’s straight line on the right really shows its steady schedule of a new release every six weeks.
Let’s close in on just 2013:
So it did happen in late 2013 (in October), and the version number was just over 24. R’s predictions were correct on both counts!
I still don’t know how to solve the system of the two equations to find where they cross, but hey, I’m enjoying Jekyll so much I couldn’t wait to post.