Question

I’d like to remove all the objects from my current environment except two of them, something like this

rm(list=setdiff(ls(),c("current_object_a","current_object_b")))

but I’d like to call it within a function. If I do it now, nothing happens because I’m deleting the environment variables inside the function, not the global environment.

Answer 1

You have to specify the environment to both ls and rm.

rm(list = setdiff(ls(globalenv()),
                  c("current_object_a", "current_object_b")),
   pos = globalenv())

But, really, why do you want to do this? Deleting things out of the global environment from within a function seems like a Bad Thing.