psi: The psi function

Description Usage Arguments Value Examples

View source: R/package_functions.R

Description

psi returns

ψ(x)=√{-W_{-1}(-x^2)}

using the Lambert W function (see package LambertW).

Usage

1
psi(x)

Arguments

x

a numeric value, possibly vectorized.

Value

A numeric value, possibly vectorized.

Examples

1
psi(.1)

optband documentation built on May 29, 2017, 7:08 p.m.