covParametersBounds {DiceKriging} | R Documentation |
Default boundaries for covariance parameters.
covParametersBounds(X, covStruct)
X |
a matrix representing the design of experiments. |
covStruct |
an object of class covTensorProduct-class . |
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 |
a list with items lower, upper
containing default boundaries for the covariance parameters.
Olivier Roustant, David Ginsbourger, Ecole des Mines de St-Etienne.