Daily/weekly/Monthly Active Users (no replies)

Hello,

Is there a plugin or another way to have on the same graph (for a given website) :
- Daily active users (D-1)
- Weekly active users (D-7)
- Monthly active users (D-30)

Maybe it can be done from the piwik_archive_numeric tables ?
Where can I find the correspondance for the period column in the piwik_archive_numeric tables ?

Thanks
Patrick