| psi.tukey {RBF} | R Documentation |
Derivative of Tukey's bi-square loss function.
Description
This function evaluates the first derivative of Tukey's bi-square loss function.
Usage
psi.tukey(r, k = 4.685)
Arguments
r |
a vector of real numbers |
k |
a positive tuning constant. |
Details
This function evaluates the first derivative of Tukey's bi-square loss function.
Value
A vector of the same length as x.
Author(s)
Matias Salibian-Barrera, matias@stat.ubc.ca, Alejandra Martinez
Examples
x <- seq(-2, 2, length=10)
psi.tukey(r=x, k = 1.5)
[Package RBF version 2.1.1 Index]