StatET in Eclipse and R

Question

I've managed to install StatET into eclipse, and I have a Java project called "Test" with some code in there. I'd like to be able to keep a .R file in that project folder and run it as a stand alone R script, seperate from the Java program. How can I do this? If I try to highlight some R code in a .R file and run it, it says "No session of R is active in the current workbench window."

Update: I added a run configuration and I now have the following error in a pop up box when I try to run the R script:

Launching the R Console was cancelled, because it seems starting the R engine failed. 
Please make sure that R package 'rj' (1.0.0 or compatible) is installed and that the R library paths are set correctly for the R environment configuration 'R'

Answer 1

You need to first start an R console from within Eclipse. Select Run -> Run Configurations... from the menu bar. If you have not already created an R configuration, you can create a new one by right-clicking on R Console. For more information, Longhow Lam put together a nice guide (PDF).

EDIT: Regarding your new error message, make sure rj is installed in R by running one of these commands in the command-line version of R. For the current StatET 2.0:

install.packages(c("rj", "rj.gd"), repos="http://download.walware.de/rj-1.0")

For the development StatET 3.0:

install.packages(c("rj", "rj.gd"), repos="http://download.walware.de/rj-1.1")

For the old StatET 0.10:

install.packages("rj", repos="http://download.walware.de/rj-0.5")

EDIT2

Its now

install.packages(c("rj", "rj.gd"), repos="http://download.walware.de/rj-2.1")

Also see http://www.walware.de/it/downloads/rj.02.01.html

Answer 2

Just had same error message and finally found that it's due to the lack of privileges to write to the library directory under R. Therefore although Eclipse shows that RJ is installed, it's actually not.

re-installed RJ to a user directory and added the directory to the R console config, it worked.