HDiR: An R Package for Computation and Nonparametric Plug-in Estimation of Directional Highest Density Regions and General Level Sets

A deeper understanding of a distribution support, being able to determine regions certain (possibly high) probability content is an important task in several research fields. Package HDiR for R designed exact computation directional (circular and spherical) highest density level sets when the fully known. Otherwise, implements nonparametric plug-in methods based on different kernel estimates reconstructing this kind sets. Additionally, it also allows estimation general functions (not necessarily density). Some exploratory tools, such as suitably adapted distances scatterplots, are implemented. Two original datasets spherical models used illustrating functionalities.