Cleaning up the global environment after sourcing: How to remove objects of a certain type in R

Question

I read in a public-use dataset that created dozens of temporary vectors in the process of building a final dataframe. Since this dataframe will be analyzed as part of a larger p

Answer 1

This should work.

source(file="script1.R")
rm(list=ls()[!sapply(mget(ls(),.GlobalEnv), is.data.frame)])

Breaking it down:

1. mget(ls()) gets all the objects in the global environment
2. !sapply(..., is.data.frame determines which is not a data.frame
3. rm(list=ls()[..] removes only the objects that are not data.frames