How do I reset all options() arguments to their default values?
If you restart your R session, it will reset the options to the default values. Options are saved in a list, and calling options() will show that list.
You can save the default options after restarting R:
backup_options <- options()
You can make any changes you need, and then to revert to the default options:
options(backup_options)
Simply run this:
default_opts <- callr::r(function(){options()}); options(default_opts)How it works
It works by starting a separate background process, accessing the default options within that session, and supplying the options back to the current session.
Example
# Default optionoptions("scipen")# $scipen# [1] 0# Set to something elseoptions(scipen = 999)# $scipen# [1] 999# Reset to defaults:default_opts <- callr::r(function(){options()}); options(default_opts)# Option is back to its default valueoptions("scipen")# $scipen# [1] 0