https://bugs.kde.org/show_bug.cgi?id=479887

--- Comment #7 from Stephane MANKOWSKI <[email protected]> ---
I'm trying to do the fix and I have many difficulties to find the good
algorithm.

Indeed,
if dates = "Last 3 months" and columns="Month" then the average=sum/3 (even if
4 columns are displayed).

Easy ! But what to do in those cases:
- dates = "Last 6 weeks" and columns="Month"
- dates = "Last 3 month" and columns="Year"
- dates = "Personalized period" and columns="Month"

My proposal could be this one:
- If columns period is the same for dates (example: month in both), then the
average is computed based on the real number of month instead of the number of
cell. "Average (on month)" is displayed in the header.
- Else the average is compute as today.

Problem:
If dates = "Last 1 year" and columns="Month" then Average will be compute as
today !!!

Do you have an idea covering all cases correctly ?

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