0th

Percentile

##### Gradient of the dimensional Scaling function

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

Keywords
models
##### 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.

scalingFun