de news: 47f49de8@news.povray.org...
>I have to solve this at work.

Never mind, I found the solution... It wasn't that difficult but as usual, 
having to explain a problem is the best way to really think about it.
Basically, the sum of the M group sizes sum(L) is equal to sum(N*Pj*j) where 
j is a number of groups and Pj the percentage of individuals belonging to j 
groups.
So we have sum(L)=sum(N*Pj*j) = N*sum(Pj*j) so N= sum(L)/sum(Pj*j)

G.


-- 
*****************************
http://www.oyonale.com
*****************************
- Graphic experiments
- POV-Ray, Cinema 4D and Poser computer images
- Posters

Post a reply to this message