Regardless of whether this is possible, it seems like a bad idea (side effects
in a functional programming environment). If you want to do something special
in startup then write a different function that does that stuff and then call
the desired functions explicitly when you want them to be called.
---------------------------------------------------------------------------
Jeff Newmiller The ..... ..... Go Live...
DCN:<jdnew...@dcn.davis.ca.us> Basics: ##.#. ##.#. Live Go...
Live: OO#.. Dead: OO#.. Playing
Research Engineer (Solar/Batteries O.O#. #.O#. with
/Software/Embedded Controllers) .OO#. .OO#. rocks...1k
---------------------------------------------------------------------------
Sent from my phone. Please excuse my brevity.
On April 23, 2014 6:11:09 PM PDT, Benjamin Tyner <bty...@gmail.com> wrote:
>
> Thanks Duncan! Yes, I considered taking advantage of .First, but was
>concerned that the .First defined by the site profile could be masked
>by a
>possible .First defined by the user profile (I neglected to mention
>that
> "--no-init-profile" [sic] in the example I gave was a simplifying
> assumption, sorry about that).
> On 04/23/2014 06:55 AM, Duncan Murdoch wrote:
>
> On 22/04/2014, 8:59 PM, Benjamin Tyner wrote:
>
> Greetings,
> Is there any way to programmatically detect whether a piece of code is
> being run within the initial (Startup) sourcing of the site profile?
> For example, say I have a site profile, "/path/to/Rprofile.site". Is
> there any function "my_func" which would return different values for
> these two instances:
> Rscript --no-site-profile --no-init-profile -e
> "sys.source('/path/to/Rprofile.site', envir = .BaseNamespaceEnv);
> my_func()"
> versus:
> export R_PROFILE=/path/to/Rprofile.site
> Rscript --no-init-profile -e "my_func()"
>
>The commandArgs() function could see the different command lines and
>your
> function could deduce the difference from that.
>As far as I know, R keeps no other records of the startup process, but
>if
>you can modify other files, you could leave a record when .First was
>run,
> and see that it was run before Rprofile.site in the first case. See
> ?Startup.
> Duncan Murdoch
>
> --
>
>
>
>------------------------------------------------------------------------
>
>______________________________________________
>R-help@r-project.org mailing list
>https://stat.ethz.ch/mailman/listinfo/r-help
>PLEASE do read the posting guide
>http://www.R-project.org/posting-guide.html
>and provide commented, minimal, self-contained, reproducible code.
______________________________________________
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
