Veteran editors

I've run over the numbers myself, and I graphed a logistic fit against the data. I think it's come out pretty good. The fitted function is Failed to parse (SVG (MathML can be enabled via browser plugin): Invalid response ("Math extension cannot connect to Restbase.") from server "https://wikimedia.org/api/rest_v1/":): {\displaystyle \frac{14988.4}{(1 + 3.50179 e^{-1.59948 (year-2006.06)})^{1.35287}}}

The export of the image was done for my by RoanKattouw as the trial edition of the software used to make the export (Mathematica) doesn't allow exports. Martijn Hoekstra 21:19, 20 March 2011 (UTC)

How did you define veteran editor? I'm trying to understand what's actually being plotted. Thanks!

I defined veteran editor as 'editor that was still active at least 12 months after first editing Wikipedia.' which IMO is a fairly 'fair' definition. I've got some data for 6 months and 24 months too, but 24 months isn't properly showing the plateau (yet). For the 2005 mark it's the number of retained editors for 12 months from the jan 2004 tranche, for the 2005.25 mark it's the number of editors retained for 15 months from the jan 2004 trance + the number of editors retained for 12 months from the april 2004 trance, etc. etc.