The average is maybe not the correct description, better is to call it
usage.
On 6 apr, 22:46, Alkis Evlogimenos ('Αλκης Ευλογημένος)
<evlogime...@gmail.com> wrote:
> On Mon, Apr 6, 2009 at 8:53 PM, Marcel Overdijk
> <marceloverd...@gmail.com>wrote:
>
> > (1) Now what I want to collect is the average value per month.
> > E.g
> > - User1, 1 jan 2009, 1000
> > - User1, 1 feb 2009, 1100
> > - User1, 1 mar 2009, 1200
> > The avarage will be 100
>
> > But maybe the user misses registering the meter reading on 1 feb:
> > - User1, 1 jan 2009, 1000
> > - User1, 1 mar 2009, 1200
> > The average will still be 1200
>
> The average is 1200? Or 100?
>
> --
>
> Alkis
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