[R] R system command does not work with objects/variables

[Prof Brian Ripley]

See ?paste
or use system2("perl", shQuote(c(p1, p2, p3)))

On Tue, 23 Aug 2011, syrvn wrote:

> Hello!
>
> with the R system command I would like to call a perl script which needs an
> input directory and an output directory in form of a path. When I put in the
> path directly it works. The script line looks as follows:
>
> system("perl '../path1' '../path2' '../path3'")
>
> If I store the path in a variable/object and call the perl script again it
> does not run and I don't know how to overcome that issue.
>
> p1 <- "../path1"
> p2 <- "../path2"
> p3 <- "../path3"
>
> system("perl p1 p2 p3")
>
> I also tried:
>
> system("perl 'p1' 'p2' 'p3'")
>
> Can anyone help?
>
> Best,
> syrvn
>
> --
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>
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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