This help topic is for R version 3.1.1. For the current version of R, try
https://stat.ethz.ch/R-manual/R-patched/library/utils/html/RHOME.html
RHOME {utils}
R Documentation
R Home Directory
Description
Returns the location of the
R
home directory, which is the root of the installed
R
tree.
Usage
R RHOME
[
Package
utils
version 3.1.1
]