estfun.Rchoice {Rchoice}

Gradient for observations

Description

It extracts the gradient for each observations evaluated at the estimated parameters for a model of class Rchoice

Usage

## S3 method for class 'Rchoice'
estfun(x, ...)

Arguments

x

a fitted model of class Rchoice,

...

Other arguments when estfun is applied to another class object

Details

For more information see estfun from package sandwich.

Value

the gradient matrix of dimension n times k

References

Zeileis A (2006), Object-oriented Computation of Sandwich Estimators. Journal of Statistical Software, 16(9), 1–16.