Enable R Languge Support in Compose

On Windows, install R (version 3.5 or newer) on your computer.

If R is not installed, download the most recent version of R from http://www.r-project.org/, unless you are required to install a specific R package approved by your organization.
On the R Project page, click download R.
Select the preferred CRAN mirror from https://cran.r-project.org/mirrors.html.
On the next page, click Download R for Windows.

On Linux, install R (version 3.5 or newer) on your computer.

Determine if R is installed on your Linux machine using the following command:
rpm -qa R
If R is not present, or if its version is older than 3.5, install the latest version of R as follows:
yum install R
If this does not work, do a yum update and install the latest epel-release first. Assuming that you are logged in as root, run the following commands:
```
yum update
yum install epel-release
yum install R
```
R is usually installed under /usr/lib64/R.
To check the version of R, use the following command:
rpm -qa R
If you need more information on installing R on Linux, see the R project website, https://www.r-project.org/, and here: http://fedoraproject.org/wiki/EPEL.

Point the environment variable R_HOME to the R installation.