pscl (version 0.5)

extractRollCallObject: return the roll call object used in fitting an ideal model

Description

Given a fitted model of class ideal, return the rollcall object that was used in the model fitting (i.e., apply all subseting and recoding implied by the dropList passed to ideal).

Usage

extractRollCallObject(object)

Arguments

object

an object of class ideal

Value

• An object of class rollcall

Details

This function is used by many post-estimation commands that operate on objects of class ideal. The function inspects the call attribute of the ideal object, extracting the name of the rollcall object and the dropList, then hands them over to dropRollCall.

See Also

rollcall; see dropRollCall for details on the form of a dropList.

Examples

data(s109)
id1 <- ideal(s109,
             d=1,
             meanzero=TRUE,
             maxiter=500,      ## short run for demo purposes
             burnin=100,
             thin=10)

tmp <- extractRollCallObject(id1)
summary(tmp)
v <- convertCodes(tmp)         ## roll call matrix per se