R: Derivative of Huber's loss function.

psi.huber {RBF} | R Documentation

## Derivative of Huber's loss function.

### Description

This function evaluates the first derivative of Huber's loss function.

### Usage

    psi.huber(r, k = 1.345)

### Arguments

`r` | a vector of real numbers
`k` | a positive tuning constant.

### Details

This function evaluates the first derivative of Huber's 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.huber(r=x, k = 1.5)

[Package RBF version 2.1.0 Index]