Question

I want R to shutdown my computer after my (extensive) simulation and saving results, is this possible?

Answer 1

Yes, look at the function shutdown in the package fun.

The flags for system command shutdown depends on your operating system, the function simply calls the appropriately flagged command.

fun::shutdown

function (wait = 0) 
{
    Sys.sleep(wait)
    ifelse(.Platform$OS.type == "windows", shell("shutdown -s -t 0"), 
        system("shutdown -h now"))
}