R: Boundaries for covariance parameters

covParametersBounds {DiceKriging} | R Documentation

## 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`

[Package DiceKriging version 1.6.0 Index]