robeth (version 2.7-6)

psp: psi' weight function for location and regression

Description

See Marazzi A. (1993), p.320

Usage

psp(s)

Arguments

s

A scalar input value

Value

The value of the psi' weight function for s

References

Marazzi A. (1993) Algorithm, Routines, and S functions for Robust Statistics. Wadsworth & Brooks/cole, Pacific Grove, California. p.320