estfun.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 Rchoice
estfun(x, ...)
Value
the gradient matrix of dimension n times k
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.
References
Zeileis A (2006), Object-oriented Computation of Sandwich
Estimators. Journal of Statistical Software, 16(9), 1--16.