R2 values from SSErr fit.variogram attribute

Thanks a lot, 

I understand what you meant now.

I was like you said the general the fact that the computed means used to produce de SSErr value was obviously weighted and there to get a true R2 the same weighted means had to be used in the computation for the SSTot...

Thanks a lot for your patience.

I wish you all to live long and prosper.

S.