On 03/09/2009 1:52 PM, Romain Francois wrote:
On 09/03/2009 05:23 PM, Duncan Murdoch wrote:
On 03/09/2009 9:53 AM, Romain Francois wrote:
Hi,
Is is possible to embed inside an R script, the name of the default
packages to be loaded when the script is invoked with Rscript.
I know about the --default-packages argument, but I was wondering if
there was a mechanism to embed this information within the script itself
I don't understand what you'd want here that you don't get with attach()
or require(). Why does it matter if they are default?
Duncan Murdoch
Sorry for being vague. I am more interested in not loading some packages:
$ time Rscript -e "#"
real 0m0.224s
user 0m0.188s
sys 0m0.032s
$ time Rscript --default-packages="base" -e "#"
real 0m0.067s
user 0m0.033s
sys 0m0.016s
$ time r -e "#"
real 0m0.039s
user 0m0.032s
sys 0m0.006s
This is related to the "How to ship R scripts with R packages" thread.
I'd like for example to ship a script that I know only requires the
"base" package. How would I specify this from within the script.
Okay, I get it. I don't think there's any way to do that. Rscript
doesn't look at the script, it just sends it to Rterm after possibly
setting R_DEFAULT_PACKAGES. So your script has no way to say it just
needs base, you need to know that before you run it.
Duncan Murdoch
______________________________________________
R-devel@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-devel
