psi {optband}R Documentation

The psi function

Description

psi returns

\psi(x)=\sqrt{-W_{-1}(-x^2)}

using the Lambert W function (see package LambertW).

Usage

psi(x)

Arguments

x

a numeric value, possibly vectorized.

Value

A numeric value, possibly vectorized.

Examples

psi(.1)


[Package optband version 0.2.2 Index]