The univariate variograms are used in the CompLinCoReg as building
blocks of multivariate variogram models.
sph
Spherical variogram
exp
Exponential variogram
gauss
The Gaussian variogram.
gauss
The cardinal sine variogram.
lin
Linear Variogram. Increases over the sill, which is
reached at range.
pow
The power variogram. Increases over the sill, which is
reached at range.
nugget
The pure nugget effect variogram.
References
Cressie, N.C. (1993) Spatial statistics
Tolosana, van den Boogaart, Pawlowsky-Glahn (2009) Estimating and
modeling variograms of compositional data with occasional missing
variables in R, StatGis09