Variogram model
Function
State
Gauss
ɣ ( s ) = C 0 + C ( 1 − exp ( − S 2 a 2 ) )
Exponential
ɣ ( s ) = C 0 + C ( 1 − exp ( − S a ) )
Global
ɣ ( s ) = C 0 + C ( ( 3 S 2 a ) − ( S 3 2 a 3 ) )
(0 ≤ s ≤ a)
ɣ ( s ) = C 0 + C
s > a
Linear
ɣ ( s ) = C 0 + C ⋅ S
Logarithmic
ɣ ( s ) = C 0 + C ⋅ log ( s )
(s > 0)