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

[From: Dave Neary]

Hi Alexey,

Just wondering - do the figures in the spreadsheet come from a real 
application, or are they contrived? They look deliberately contrived.

How does the curve look with the formula in the wiki if, instead of the 
download totals being for the current day, they're for the previous 
month? The idea of previous month or previous week is to even out the 
spikes you mention, while giving the same timeframe for all apps.

Cheers,
Dave.

Alexey Zakhlestin wrote:
> 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
> 

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