covParametersBounds {DiceKriging}

Boundaries for covariance parameters

Description

Default boundaries for covariance parameters.

Usage

covParametersBounds(object, X)

Arguments

object

an object specifying the covariance structure.

X

a matrix representing the design of experiments.

Details

The default values are chosen as follows :

Range parameters (all covariances)	lower=1e-10, upper=2 times the difference between
	the max. and min. 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