extractRollCallObject function

return the roll call object used in fitting an ideal model

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

passed to ideal).

extractRollCallObject(object)

Arguments

• object: an object of class ideal

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.

Returns

An object of class rollcall

Author(s)

Simon Jackman simon.jackman@sydney.edu.au

See Also

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

Examples

data(s109)
f = system.file("extdata","id1.rda",package="pscl")
load(f)
tmp <- extractRollCallObject(id1)
summary(tmp)
v <- convertCodes(tmp)         ## roll call matrix per se