GetImpossibleHouseholds
                        Generate the desired number of impossible
                        households required to observe a given number
                        of possible households.
RunModel                Run the mcmc sampler for the model.
SampleMissing           Sample and update missing data
UpdateAlpha             Update alpha.
UpdateBeta              Update beta.
UpdateLambda            Update lambda.
UpdateLambdaWeighted    Update lambda.
UpdateOmega             Update omega and v.
UpdateOmegaWeighted     Update omega and v.
UpdatePhi               Update phi.
UpdatePhiWeighted       Update phi.
UpdatePi                Update pi and u.
UpdatePiWeighted        Update pi and u.
checkSZ                 The new implementation of checkconstraints and
                        will evently replace checkconstraints.
checkSZ2                Michael: Edit here
checkconstraints        Checking a data matrix of households for the
                        possible/impossible status under a predefined
                        set of structural zeros.
checkconstraints_HHhead_at_group_level
                        Checking a data matrix of households for the
                        possible/impossible status under a predefined
                        set of structural zeros.
groupcount              Generate 2D count table for two integer-valued
                        vectors.
groupcount1D            Generate histogram count for an integer-valued
                        vector.
households2individuals
                        Convert a household data matrix to the
                        corresponding individual member data matrix.
initData                Initialize the input data structure.
initMissing             Initilize the misising data structure from
                        input data
initOutput              Set the output structure for saving posterior
                        samples of parameters.
initParameters          Initialize the model parameters for the MCMC.
sampleG                 Update household (group) level latent class
                        indexes.
sampleM                 Update individual level latent class indexes.
samplehouseholds        Rcpp implementation for sampling household data
                        without constraints.
