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]