Check if R is running in RStudio

Question

I am looking for a way to test if R is being run from RStudio. For some reason I could find the answer on google yesterday but not today, but I think it had to do with testi

Answer 1

To add to the number of nice guesses, here is a message from 2011 (Ice Age)

http://support.rstudio.org/help/discussions/problems/413-location-of-installed-packages

if (Sys.getenv("RSTUDIO_USER_IDENTITY")!= ""){
.libPaths(.Library) # Avoid additional libraries } else { # not rstudio ...