dpoistweedie            The individual probabilities of Y when Y
                        follows a Poisson-Tweedie Distributions
poistweedie             Poisson-Tweedie (Some discrete exponential
                        dispersion models)
ppoistweedie            Distribution function for the Poisson-Tweedie
                        family
qpoistweedie            Quantile function for the Poisson-Tweedie
                        family of distributions
rpoistweedie            Random generation for the Poisson-Tweedie
                        family of distributions
varpt                   variance for the Poisson-Tweedie family of
                        distributions
