FLXdist which represent unfitted finite mixture
models.FLXdist(formula, k = NULL, model = FLXMRglm(), components,
concomitant = FLXPconstant())~x|g where x is the set of predictors
and g an optional grouping factor for repeated measurements.FLXM or a list of FLXM
objects. Default is the object returned by calling
FLXMRglm().FLXconcomitant specifying
the model for concomitant variables.FLXdist.FLXdist-class