R.home(component = "home")
"home"which gives the R home directory, other known values are
"share"giving the paths to the corresponding parts of an R installation.
"modules"and on Windows
"bin"is a sub-architecture-specific location.On a Unix-alike, the constructed paths are based on the current values of the environment variables R_HOME and where set R_SHARE_DIR, R_DOC_DIR and R_INCLUDE_DIR (these are set on startup and should not be altered).On Windows the values of
R.home()and R_HOME are switched to the 8.3 short form of path elements if required and if the Windows service to do that is enabled. The value of R_HOME is set to use forward slashes (since many package maintainers pass it unquoted to shells, for example in Makefiles).
The R home directory is often referred to as R_HOME,
and is the value of an environment variable of that name in an R
It can be found outside an R session by