how can I write code to detect whether the machine is Windows or Linux?

[Philip James Smith]

Hi R-People:

I use 2 machines: a machine with a Windows XP operating system, and
another with a Linux Ubuntu OS. I transport my code between these 2
machines. However, pathnames to data files always need to be "adjusted"
to account for the OS that I'm working on.

Here is my question:

How do I write code to detect whether I'm using the XP or the Linux
machine?

If I knew this, I could write my code in a way so that I didn't have to
adjust path names to data file all the time.

I checked the archives... didn't find anything, but perhaps didn't know
the right search terms...

Thanks for your help, R-community! Please respond to:
philipsmith@...

Best regards,
Phil Smith
Duluth, GA

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[Rolf Turner-3]

On 24/07/2008, at 9:53 AM, Philip James Smith wrote:

> Hi R-People:
>
> I use 2 machines: a machine with a Windows XP operating system, and  
> another with a Linux Ubuntu OS. I transport my code between these 2  
> machines. However, pathnames to data files always need to be  
> "adjusted" to account for the OS that I'm working on.
>
> Here is my question:
>
> How do I write code to detect whether I'm using the XP or the Linux  
> machine?
>
> If I knew this, I could write my code in a way so that I didn't  
> have to adjust path names to data file all the time.
>
> I checked the archives... didn't find anything, but perhaps didn't  
> know the right search terms...

        The help for ``version'' says to use .Platform$OS.type
        to check what platform the code is running on.

                cheers,

                        Rolf Turner

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[Marc Schwartz]

on 07/23/2008 04:53 PM Philip James Smith wrote:

> Hi R-People:
>
> I use 2 machines: a machine with a Windows XP operating system, and
> another with a Linux Ubuntu OS. I transport my code between these 2
> machines. However, pathnames to data files always need to be "adjusted"
> to account for the OS that I'm working on.
>
> Here is my question:
>
> How do I write code to detect whether I'm using the XP or the Linux
> machine?
>
> If I knew this, I could write my code in a way so that I didn't have to
> adjust path names to data file all the time.
>
> I checked the archives... didn't find anything, but perhaps didn't know
> the right search terms...
>
> Thanks for your help, R-community! Please respond to:
> philipsmith@...

See ?.Platform

For example:

 > .Platform$OS
[1] "unix"

It's always dangerous to say always, but "in general", the use of:

   Path/To/File

with *forward* slashes, will work on both Windows and Linux, including
the use of relative paths.

See:

http://cran.r-project.org/doc/FAQ/R-FAQ.html#How-do-file-names-work-in-Windows_003f

and
 
http://cran.r-project.org/bin/windows/base/rw-FAQ.html#R-can_0027t-find-my-file

for some hints.

HTH,

Marc Schwartz

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R-help@... 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.

[Gabor Grothendieck]

Ryacas is one package that checks this.  Look at this file:

http://ryacas.googlecode.com/svn/trunk/R/yacasInstall.R

On Wed, Jul 23, 2008 at 5:53 PM, Philip James Smith
<philipsmith@...> wrote:

> Hi R-People:
>
> I use 2 machines: a machine with a Windows XP operating system, and another
> with a Linux Ubuntu OS. I transport my code between these 2 machines.
> However, pathnames to data files always need to be "adjusted" to account for
> the OS that I'm working on.
>
> Here is my question:
>
> How do I write code to detect whether I'm using the XP or the Linux machine?
>
> If I knew this, I could write my code in a way so that I didn't have to
> adjust path names to data file all the time.
>
> I checked the archives... didn't find anything, but perhaps didn't know the
> right search terms...
>
> Thanks for your help, R-community! Please respond to:
> philipsmith@...
>
> Best regards,
> Phil Smith
> Duluth, GA
>
> ______________________________________________
> R-help@... 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@... mailing list
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.

[Peter Dalgaard]

Marc Schwartz wrote:
>
>
> It's always dangerous to say always, but "in general", the use of:
>
>   Path/To/File
>
> with *forward* slashes, will work on both Windows and Linux, including
> the use of relative paths.
>
Also, notice the existence of file.path() and system.file(). (Other
separators than forward and backward slashes have been used in the path;
e.g. on original MacOS, the colon was used.)

--
   O__  ---- Peter Dalgaard             Øster Farimagsgade 5, Entr.B
  c/ /'_ --- Dept. of Biostatistics     PO Box 2099, 1014 Cph. K
 (*) \(*) -- University of Copenhagen   Denmark      Ph:  ([phone]
~~~~~~~~~~ - (p.dalgaard@...)              FAX: [phone]

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