((Subscript[PV, I])=((PV_sum)/(D_sum))   where(Equation   2)PV_sum=(∑_(i=1)^(OverHat[N]))((Subscript[PV, i])/(Subscript[D, i])),(Equation   3)D_sum=(∑_(i=1)^(OverHat[N]))(1/(Subscript[D, i])),and
(Subscript[PV, i])   is   the   parameter   value   for   the   ith   point   of   
the   (OverHat[N])   neighboring   points.(Equation   4))