Removing all objects from work-space except one - R

Question

These are the list of objects in my work-space:

ls()
[1] "num1" "num2" "num3" "num4" "num5"

I would want to remove all the objects from the work-space except 'num1'

Answer 1

You can use the 'keep()' function from the 'gdata' package:

library(gdata)

The below command will show you which objects will be removed:

> keep(num1)
[1] "num2" "num3" "num4" "num5"

To remove those objects, you need to add sure=TRUE

keep(num1,sure = TRUE)

ls()
[1] "num1"