问题
As noted in the title, I'm trying to understand how to reset all arguments in options() to their default settings. I searched online and in the ?options help file and am failing to locate an answer.
I expect the answer is readily available, and I'm simply struggling to find it.
Thanks.
Edit: While I agree How to set R to default options? is the same question, I'm failing to see in its selected answer the clear/explicit solution I requested: how to reset options() to its defaults. The selected answer in that thread clearly explains how to save options() settings and load them later.
回答1:
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)
回答2:
I never tried it myself, but the settings package seems to provide a possibility to restore the default values without previously storing them:
library(settings)
reset(options)
来源：https://stackoverflow.com/questions/36848785/how-do-i-reset-all-options-arguments-to-their-default-values