Installing Rtools

Jeffrey Leek, Assistant Professor of Biostatistics
Johns Hopkins Bloomberg School of Public Health

What is Rtools?

Download Rtools

  • Select the .exe download link from the table that corresponds to your version of R
    • Note: If you're not sure what version of R you have, open or restart R and it's the first thing that comes up in the console
  • If you have the most recent version of R, you should select the most recent Rtools download (at the top of the chart)
  • Once the download completes, open the .exe file to begin the installation

Install Rtools

  • Unless you really know what you are doing, you should just go with the default selections at each step of the installation
  • There are only two exceptions worth noting:
    • If you already have Cygwin installed on your machine, you should follow the instructions given during installation (and linked to here:
    • IMPORTANT: You should make sure that the box is checked to have the installer edit your PATH (see below).

Install devtools

  • Once the Rtools installation completes, open RStudio
  • Install the devtools R package if you have not previously done so
    • If you aren't sure, enter find.package("devtools") in the console
  • To install devtools, use install.packages("devtools")

Verify Rtools installation

  • After devtools is done installing, load it using library(devtools)
  • Then type find_rtools() as shown below
  • This should return TRUE in the console if your Rtools installation worked properly