How to calculate mean value for an angle by zenOn?

Hi,
My question is as the title: How to calculate mean value for an angle by zenOn?
I know the calculation of mean value of an angle is not a simple subject. I just want to know if you have integrated any magic module under zenOn for this calculation or not. If not, I think I am obliged to construct this calculation by myself. That would be a little tedious..
Best regards,

This is a migrated post! Originally posted on 12.09.2011 by user lephis. Please be aware that information can be outdated.