[Rd] R_HOME default setting

[Karim Mezhoud]

Dear All,
I would like to reset default R_HOME PATH for R.3.1.3.
I installed R-devel in /usr/local/R-devel but I can't install many packages
as tcltk.
I uninstalled R-devel and I would reuse R.3.1.3 but the PATH is remaining
to  /usr/local/R-devel.

I touch ~.Renviron file with

R_HOME=/usr/lib/R/bin/
RSTUDIO_R_HOME=/usr/lib/R/bin/

R_LIBS=~/R/x86_64-pc-linux-gnu-library/3.1

R_LIBS_USER=${R_LIBS_USER-'~/R/x86_64-pc-linux-gnu-library/3.1'}

Without success.
Any idea?
which file has the R_HOME setting?
Thanks
Karim

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