On 09/04/2009 04:20 PM, Simon Urbanek wrote:
On Sep 3, 2009, at 13:52 , 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.
Well, what's wrong with:
Great. Just a bit of work to generate the shebang line at INSTALL time
(Rscript is at /usr/local/bin on my machine).
... or perhaps I could use #!/bin/env
#!/usr/bin/Rscript --default-packages=base
ginaz:sandbox$ time ./scr
real 0m0.045s
user 0m0.027s
sys 0m0.017s
.. as opposed to
#!/usr/bin/Rscript --default-packages=base
ginaz:sandbox$ time ./scr
real 0m0.201s
user 0m0.166s
sys 0m0.034s
Cheers,
Simon
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Romain Francois
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