RandomFields (version 2.0.71)

GetPracticalRange: Determination of the practical range

Description

the function returns the practical range of a covariance model, i.e. the distance for which the model with standard parameters (variance=1, nugget=0, scale=1) values 0.05

Usage

GetPracticalRange(model, param, dim=1)

Arguments

model

covariance model in the new list not; the model must be primitive, i.e. may not call other models. See Covariance and CovarianceFct

param

optional vector of parameters for the model, see CovarianceFct

dim

space-time dimension; except for some few anisotropic models, this parameter does not have an effect

Value

• real number (the practical range)

Details

In case the practical range has to be determined numerically, only a rough approximation is provided.

The function can only be applied to isotropic models

References

Goovaerts, P. (1997) Geostatistics for Natural Resources Evaluation. New York: Oxford University Press.

See Also

CovarianceFct, RandomFields, RFparameters,

Examples

GetPracticalRange(list("exponential"))
GetPracticalRange(list("whittle", nu=2))
try(GetPracticalRange(list("bessel", nu=-0.5))) # leads to an error

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