[Rd] Best way to locate R executable from within R?

[Dan Tenenbaum]

On Tue, May 22, 2012 at 10:34 AM, Henrik Bengtsson <hb at biostat.ucsf.edu> wrote:
> Hi,
>
> I'd like to spawn of a new R process from within R using system(),
> e.g. system("R -f myScript.R").  However, just specifying "R" as in
> that example is not guaranteed to work, because "R" may not be on the
> OS's search path.
>
>  What is the best way, from within a running R, to infer the command
> (basename or full path) for launching R in way that it works on any
> OS?  I came up with the following alternatives, but I'm not sure if
> they'll work everywhere or not:
>
> 1. Rbin <- commandArgs()[1];
>
> 2. Rbin <- file.path(R.home(), "bin", "R");
>
> Other suggestions that are better?

Rbin <- file.path(Sys.getenv("R_HOME"), "bin", "R")

Dan


>
> /Henrik
>
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