Re: [R] system() function

From: Prof Brian Ripley <ripley_at_stats.ox.ac.uk>
Date: Fri, 25 Apr 2008 05:43:02 +0100 (BST)

You don't want shQuote - that makes it a single argument.

Shells strip quotes, but system() does not use a shell on Windows -- you could use shell() not system(), but that would be overkill here.

On Thu, 24 Apr 2008, Jeff Breiwick wrote:

> Hi,
>
> I am trying to run the command: R CMD INSTALL -l mypath mypackagename
> from within R (Windows XP) using system() and get the following error:
>
> ARGUMENT 'CMD INSTALL -l D:/R/JMB.LIBS jmb.test' __ignored__
>
> Fatal error: you must specify '--save', '--no-save' or '--vanilla'
>
> My function contains these 3 lines:
> setwd("D:/R/R.pkgs") # path to files set using package.skeleton()
> commands <- shQuote("CMD INSTALL -l D:/R/JMB.LIBS jmb.test")
> system(paste('"R"',commands))
>
> Can anyone tell me where I have gone astray? I suspect the problem lies in
> quoting the strings. The command (R CMD INSTALL etc.) runs OK if I run it in
> a windows shell.
> Thank you.
>
> Jeff Breiwick
>
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>

-- 
Brian D. Ripley,                  ripley_at_stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272866 (PA)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595

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Received on Fri 25 Apr 2008 - 04:58:37 GMT

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