gstat (version 1.1-3)

fit.lmc: Fit a Linear Model of Coregionalization to a Multivariable Sample Variogram

Description

Fit a Linear Model of Coregionalization to a Multivariable Sample Variogram; in case of a single variogram model (i.e., no nugget) this is equivalent to Intrinsic Correlation

Usage

fit.lmc(v, g, model, fit.ranges = FALSE, fit.lmc = !fit.ranges, 
correct.diagonal = 1.0, ...)

Arguments

v

multivariable sample variogram, output of variogram

g

gstat object, output of gstat

model

variogram model, output of vgm; if supplied this value is used as initial value for each fit

fit.ranges

logical; determines whether the range coefficients (excluding that of the nugget component) should be fitted; or logical vector: determines for each range parameter of the variogram model whether it should be fitted or fixed.

fit.lmc

logical; if TRUE, each coefficient matrices of partial sills is guaranteed to be positive definite

correct.diagonal

multiplicative correction factor to be applied to partial sills of direct variograms only; the default value, 1.0, does not correct. If you encounter problems with singular covariance matrices during cokriging or cosimulation, you may want to try to increase this to e.g. 1.01

...

parameters that get passed to fit.variogram

Value

returns an object of class gstat, with fitted variograms;

References

http://www.gstat.org/

See Also

variogram, vgm, fit.variogram, demo(cokriging)