R: Penalty function derivative

SCAD.derivative {DiceKriging} | R Documentation

## Penalty function derivative

### Description

Derivative of SCAD function.

### Usage

    SCAD.derivative(x, lambda)

### Arguments

`x` | a vector where the function is to be evaluated.
`lambda` | a number representing a tuning parameter.

### Value

A vector containing the SCAD derivative values at `x`.

### Author(s)

O. Roustant, D. Ginsbourger, Ecole des Mines de St-Etienne.

### References

R. Li and A. Sudjianto (2005), Analysis of Computer Experiments Using Penalized Likelihood in Gaussian Kriging Models, Technometrics, 47 no. 2, 111-120.

### See Also

`SCAD`, `km`

[Package DiceKriging version 1.5.5 Index]