DiceKriging: scalingGrad – R documentation

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DiceKriging

scalingGrad

Gradient of the dimensional Scaling function

Description

Gradient of the Scaling function (marginal in dimension k) of Xiong et al. with respect to eta

Usage

scalingGrad(X, knots, k)

Arguments

`X`	an n*d matrix standing for a design of n experiments in d-dimensional space.
`knots`	a list of knots parametrizing the transformation.
`k`	dimension of the input variables for which the gradient is calculated.

Value

Gradient of the Scaling function of Xiong et al. with respect to eta

References

Y. Xiong, W. Chen, D. Apley, and X. Ding (2007), Int. J. Numer. Meth. Engng, A non-stationary covariance-based Kriging method for metamodelling in engineering design.