windows vs. linux code

There is one MAJOR issue you will have to watch out for, far more
likely to turn up than calls like system().

This is that, if you want to have two or more plotting windows
in use at the same time, while the first one is autoatically
opened by the plot() command, you will have to open additional
ones explcitily.

In Linux, the command is X11() [possibly with paramaters, though
usually you don't need to bother].

In Windows, it is windows() [ditto].

I run R on Linux, so use the X11() command. However, If I write
a script which would also be run on a Windows system, I write
using windows() in the first instance, but with a conditional
"alias" to X11():

?if(length(grep("linux",R.Version()$os))){
?windows <- function( ... ) X11( ... )
}

and put this at the beginning of the code file. Then, if the code
is run on a Windows machine, the function call windows() does the
Windows thing; but if the code is run on Linux then the above test
detects that, and defines a function windows() which does the same
as X11().

Ted.

On 26-Feb-09 01:25:36, Sherri Heck wrote:

i am asking if, in general, r code can be written on a linux-based
system and then run on a windows-based system.

Rolf Turner wrote:

On 26/02/2009, at 2:08 PM, Sherri Heck wrote:

Dear All-

I have been given some Rcode that was written using a Linux OS, but I
use Windows-based R. ?The person that is giving it to me said that it
needs to run on a Linux system. ?Does anyone have any insight and/or
can
verify this. ?I haven't yet obtained the code, so I haven't been able
to
try it yet.

Despite the knowledge, wisdom, insight, skill, good looks, and other
admirable characteristics of the members of the R-help list, few of
us are skilled in telepathy or clairvoyance.

? ? cheers,

? ? ? ? Rolf Turner

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