It appears you don't have a PDF plugin for this browser. You can click here to download the reference manual.
1.4.1 by Jose Barrera-Gomez, 8 days ago
https://sites.google.com/view/josebarrera/
Browse source code at https://github.com/cran/christmas
Authors: Jose Barrera-Gomez [aut, cre] (ORCID:
Documentation: PDF Manual
GPL (>= 3) license
Imports animation, grDevices, graphics, stats, methods
Suggests testthat
See at CRAN