[R-sig-Geo] variogram models in gstat

[Saman Monfared]

Dear all,
How can I see mathematical formulation of variogram models in gstat?
Some of them are in gstat manual but there aren't others like
("Exc,"Ste","Mat","Hol").

Thanks.

-- 
Saman Monfared
Msc, Department of Statistics, Shiraz University,
Shiraz 71454, Iran
Email: Samanmonfared1 at gmail.com

Tel: +98 917 5305167



-- 
Saman Monfared
Msc, Department of Statistics, Shiraz University,
Shiraz 71454, Iran
Email: Samanmonfared1 at gmail.com

Tel: +98 917 5305167