Download : Rtools31.exe
Double click the .exe file to start the installation wizard.
“Select Destination Location” window, use the default path (C:\Rtools).
“Select Components” window, select Full installation to build R.
“Select R Source Home Directory” window, accept the default path (C:\R).
“Select Additional Tasks” window, check all boxes to enable system editing in the next step.
“System Path” window, type in the R installation path in the dialogue box.
If R is installed in its default path, depending on the OS build, type in one of the following:
C:\Program Files\R\R-2.11.1\bin; For Windows 32 bit
C:\Program Files (x86)\R\R-2.11.1\bin; For Windows 64 bit
If R is not installed in its default path, find out its installation path first.
Right click the R desktop icon or start menu shortcut and go to “Properties”.
The R program location is displayed in the “Target” box.
The R installation path is the part before bin\.
Be sure to append a semicolon to the path name and use forward-slashes.
Complete the installation by accepting all other default settings.