Spherical Principal Curves R package spherepc version 0.1.7 Fitting dimension reduction methods to data lying on two-dimensional sphere. This package provides principal geodesic analysis, principal circle, principal curves proposed by Hauberg, and spherical principal curves. Moreover, it offers the method of locally defined principal geodesics which is underway. The detailed procedures are described in Lee, J., Kim, J.-H. and Oh, H.-S. (2021) <doi:10.1109/TPAMI.2020.3025327>. Also see Kim, J.-H., Lee, J. and Oh, H.-S. (2020) <arXiv:2003.02578>. Software Depends: R (>= 3.5.0) Imports: geosphere, rgl, sphereplot, stats Jongmin Lee <jongminlee9218@gmail.com> Comprehensive R Archive Network (CRAN) Jongmin Lee [aut, cre], Jang-Hyun Kim [ctb], Hee-Seok Oh [aut] GPL (>= 3) 2021-10-07 application/tgz https://CRAN.R-project.org/package=spherepc doi:10.32614/CRAN.package.spherepc