In R, how do I execute a script that sets environment variables within the same shell session?
On 12-05-22 1:24 PM, Michael wrote:
In R, how do I execute a script that sets environment variables within the same shell session? Hi all, Could you please shed some lights on how to do this? In a shell, I launched the R session. But then in R, I realized that some environment variables need to be set up. Of course I can use "Sys.setenv()"... But I have so many of them... And for some special reason, I have to first launch R and then run the script from within R to set up the environment variables... i.e. I cannot do the other way around, which is first execute the script in the shell, and then launch the R session(which is the usual sequenc of ordering)... So my question is: I have to launch R session first, and then run the scrip from within R. But if I naively use "shell" or "system", that's going to not affect the same shell that the R is using... I would like the R session to be able to access those "global" environment variables... How do I do that?
You already answered it. Use Sys.setenv(). It will only affect the current process. Duncan Murdoch