Creator functions for the concomitant variable
model. FLXPconstant specifies constant priors
and FLXPmultinom multinomial logit models for the priors.
FLXPconstant()
FLXPmultinom(formula = ~1)Object of class FLXP. FLXPmultinom returns an
object of class FLXPmultinom which extends class
FLXP directly and is used for method dispatching.
A formula for determining the model matrix of the concomitant variables.
Friedrich Leisch and Bettina Gruen
FLXPmultinom uses nnet.default from nnet to fit the
multinomial logit model.