R: Gradient of the dimensional Scaling function

scalingGrad {DiceKriging} | R Documentation

## 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.

### See Also

`scalingFun`

[Package DiceKriging version 1.6.0 Index]