robustreg (version 0.1-3)

derivPsiBiSquare: Derivative of Bisquare Psi Function

Description

Calculates residual from the first derivative of Bisquare psi function

Usage

derivPsiBiSquare(r,c)

Arguments

r

Value to be evaluated by function

c

Tuning constant

Value

• r: Value to be evaluated by function

  c: Tuning constant

Details

Calculates residual from the first derivative of Bisquare psi function

References

Tukey

See Also

psiBiSquare()