model.param.define {RGeostats} | R Documentation |
Specification of the Model Parameters
model.param.define(rank.model, nostat = NULL, verbose=FALSE)
rank.model |
Rank of the slot to which the model has been assigned |
nostat |
Array of keywords which define the set of Non-stationary parameters. Each keyword follows the following syntax: G'igrf'M'istr”type”v1'[-'v2']='value' Example: "G1M2V2-3" for the Sill of the cross-variogram between Variables #2 and #3, for the Structure #2 of the Random Function #1.
All elements 'igrf', 'istr', 'v1' and 'v2' start from 1. The order in which the keywords are defined is important: it provides the order in which the corresponding Non-stationary locators are read. Finally all the characters involved in this grammar are case-insensitive |
verbose |
Verbosity flag |
An array of such keywords can be specified for particular usage:
To designate the 'variable' parameter of the Model in the case of Moving Geostatistics.
To designate the list of constraints applied during the automatic inference of the parameters of a Model:
Initial value of a parameter
Lower or Upper bounds for a parameter definition interval
Value assigned to a parameter
To check that the constraints have been defined correctly, use the
'verbose' option of model.auto
function
Next follow some examples:
Case of a isotropic model with 1 spherical structure: its range must be equal to 10: model.auto(vario,struct=3,equal="R=10")
Case of an isotropic model with 2 structure (exponential, spherical): the range of the spherical must lie between 2 and 3: model.auto(vario.struct=c(2,3),lower="M2R=2",upper="M2R=3")