R_LIBS_USER not in libPaths

I have not intentionally set R_LIBS_USER. I looked for an Renviron.site
file but did not see it in R/etc or my home directory. The strange part is
that if I print Sud.getenv I see a value for R_LIBS_USER. However, this
directory is not showing under libPaths.

I though .libPaths should contain R_LIBS_USER.

I also noticed that R related variables are not in the system or user
variables because I dont see them when I type SET from the Windows Command
line. So a related question is where does R get the system variables
(e.g., R_LIBS_USER,
R_HOME) if I dont see a Renviron.site file. Thanks

On Sep 16, 2017 10:45 AM, "Henrik Bengtsson" <henrik.bengtsson at gmail.com>
wrote:

I'm not sure I follow what.the problem is. Are you trying to
set R_LIBS_USER but R does not acknowledge it, or do you observe something
in R that you didn't expect to be there and you are trying to figure out
why that is / where that happens?

Henrik

I have a computer where R_LIBS_USER is not found in libPaths. This is for
Windows (x64). I ran R from the command line, RGui and RStudio and I get
the same results. I also ran R --vanilla and I still get the discrepancy.

The only thing I found interesting was that I also ran SET from the command
line and the "R related variables" (e.g.,  R_HOME; R_LIBS_USER) are not
there. Therefore these variables are being set when I start R. I have not
been able to track where does R obtain the value for these.

Aside from looking at
http://stat.ethz.ch/R-manual/R-patched/library/base/html/Startup.html I am
not sure I have much more information that I have found useful.

Thanks

R

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