R help - Jul 2005 - Using system to run a stand alone program that requires input in Windows

Under Windows I want to run a stand alone program that takes a number
of commands from the user. I've been running the program from the
command line using <

C:\Data\> foo.exe < params.txt

where foo is the program is params.txt is a text file with a few lines
(9) of parameters.

I want to run this from R using system a la:

system("foo.exe", input = "params.txt")

but that doesn't do it. What am I missing?

platform i386-pc-mingw32
arch     i386           
os       mingw32        
system   i386, mingw32  
status                  
major    2              
minor    1.0            
year     2005           
month    04             
day      18             
language R

Dr Carbon wrote:
> Under Windows I want to run a stand alone program that takes a number
> of commands from the user. I've been running the program from the
> command line using <
> 
> C:\Data\> foo.exe < params.txt
> 
> where foo is the program is params.txt is a text file with a few lines
> (9) of parameters.
> 
> I want to run this from R using system a la:
> 
> system("foo.exe", input = "params.txt")
>
> but that doesn't do it. What am I missing?
You misinterpreted "input":

   system("foo.exe < params.txt")

should be sufficient. See also ?shell.

Uwe Ligges




> platform i386-pc-mingw32
> arch     i386           
> os       mingw32        
> system   i386, mingw32  
> status                  
> major    2              
> minor    1.0            
> year     2005           
> month    04             
> day      18             
> language R
> 
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