Directional Highest Density Regions R package HDiR version 1.1.3 We provide an R tool for computation and nonparametric plug-in estimation of Highest Density Regions (HDRs) and general level sets in the directional setting. Concretely, circular and spherical HDRs can be reconstructed from a data sample following Saavedra-Nieves and Crujeiras (2021) <doi:10.1007/s11634-021-00457-4>. This library also contains two real datasets in the circular and spherical settings. The first one concerns a problem from animal orientation studies and the second one is related to earthquakes occurrences. Software Depends: R(>= 3.5.0) Imports: NPCirc, circular, rgl, Directional, movMF, graphics, stats, grDevices Suggests: ggplot2, maps, mapproj, DirStats Paula Saavedra-Nieves <paula.saavedra@usc.es> Comprehensive R Archive Network (CRAN) Paula Saavedra-Nieves [aut, cre], Rosa M Crujeiras [aut], Andrés Prieto [ctb], Felicita Scapini [dtc] GPL-2 2022-11-16 application/tgz https://CRAN.R-project.org/package=HDiR doi:10.32614/CRAN.package.HDiR