geom_hdr                Highest density regions of a 2D density
                        estimate
geom_hdr_fun            Highest density regions of a bivariate pdf
geom_hdr_points         Scatterplot colored by highest density regions
                        of a 2D density estimate
geom_hdr_points_fun     Scatterplot colored by highest density regions
                        of a bivariate pdf
geom_hdr_rug            Rug plots of marginal highest density region
                        estimates
geom_hdr_rug_fun        Rug plots of highest density region estimates
                        of univariate pdfs
get_hdr                 Computing the highest density regions of a 2D
                        density
get_hdr_1d              Computing the highest density regions of a 1D
                        density
ggdensity               ggdensity: Stats and Geoms for Density
                        Estimation with ggplot2
method_freqpoly         Bivariate frequency polygon HDR estimator
method_freqpoly_1d      Univariate frequency polygon HDR estimator
method_histogram        Bivariate histogram HDR estimator
method_histogram_1d     Univariate histogram HDR estimator
method_kde              Bivariate kernel density HDR estimator
method_kde_1d           Univariate kernel density HDR estimator
method_mvnorm           Bivariate parametric normal HDR estimator
method_norm_1d          Univariate parametric normal HDR estimator
