Install Rtools

  1. Download "Rtools216.exe" from CRAN.


  2. Click on the downloaded file to start installation.


  3. Click on the Next button.


  4. Click on the Next button.


  5. Click on the Next button.


  6. This step may be different from the default, but basically I don't prefer to set path here. Uncheck boxes, and click on the Next button.


  7. Click on the Next button.


  8. Click on the Finish button.