covParametersBounds {DiceKriging}R Documentation

Boundaries for covariance parameters

Description

Default boundaries for covariance parameters.

Usage

covParametersBounds(X, covStruct)

Arguments

X a matrix representing the design of experiments.
covStruct an object of class covTensorProduct-class.

Details

The default values are chosen as follows :
Range parameters (all covariances) lower=1e-10, upper=2 times the difference between the maximum and minimum values of X for each coordinate
Shape parameters (powexp covariance) lower=1e-10, upper=2 for each coordinate

Value

a list with items lower, upper containing default boundaries for the covariance parameters.

Author(s)

Olivier Roustant, David Ginsbourger, Ecole des Mines de St-Etienne.

See Also

km


[Package DiceKriging version 1.0 Index]