estfun.Rchoice function

Gradient for observations

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

## 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

Returns

the gradient matrix of dimension n times k

Details

For more information see estfun from package sandwich.

References

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