[maemo-community] regargind maemo.org app-karma

[From: Alexey Zakhlestin]

Hi, everyone.
 I recently started to work with nemein and among other things working
on application karma task from current sprint.

We talked with Niels Brett a yesterday and decided, that formula from here:
http://wiki.maemo.org/Task:Karma_for_applications wouldn't work. It is too
rough and will give a lot of spikes. Instead, I proposed another one.
Here is a little test-spreadsheet for formulas:
http://spreadsheets.google.com/ccc?key=reZ9v3xyJKfKhHAvs9gixqA

Column F has formula which compares average data from latest week with
average data from last week. Also, it uses coefficients to make impact of
parameters smaller. It is not perfect, still (karma can get negative under
some circumstances, but that would be difficult to achieve). I like, that it
gives a smooth curve to karma and helps to highlight apps which recently
became more popular.

Implementation of this formula will require 2 weeks of daily-stats. Niels
will start to gather those (we still need to discuss how those will be
stored).

If you have any ideas on making formula better, I will be glad to
implement those. As soon as we have enough stats-data we would be able
to tweak formula and see results instantly

-- 
Alexey Zakhlestin
http://www.milkfarmsoft.com/