GetPracticalRange {RandomFields} | R Documentation |
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
GetPracticalRange(model, param, dim=1)
model |
covariance model in the new list not;
the model must be primitive, i.e. may not call other models.
See |
param |
optional vector of parameters for the model,
see |
dim |
space-time dimension; except for some few anisotropic models, this parameter does not have an effect |
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
real number (the practical range)
Martin Schlather, martin.schlather@math.uni-goettingen.de http://www.stochastik.math.uni-goettingen.de/~schlather
Goovaerts, P. (1997) Geostatistics for Natural Resources Evaluation. New York: Oxford University Press.
CovarianceFct
,
RandomFields
,
RFparameters
,
GetPracticalRange(list("exponential")) GetPracticalRange(list("whittle", nu=2)) try(GetPracticalRange(list("bessel", nu=-0.5))) # leads to an error