R help - Jun 2011 - storing the return of system() function

To get the tech specs out of the way I am running Rstudio(R 2.13.0) on a
ubuntu box. I am trying to use information returned from the system command
within an Rscript. System() passes commands to my ubuntu prompt and returns
the normal messages.
For example.
> system("date")Thu Jun 30 21:48:20 UTC 2011
However when i try to store this return(something i need to do for my
purposes) nothing is stored(or at least not what shown on the R prompt)
> store<-system("date")Thu Jun 30 21:49:27 UTC 2011> store[1]
0
How do i capture the return of system()?

Thanks R-world,

John Dennison

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On Jun 30, 2011, at 4:55 PM, John Dennison wrote:
> To get the tech specs out of the way I am running Rstudio(R 2.13.0) on a
> ubuntu box. I am trying to use information returned from the system command
> within an Rscript. System() passes commands to my ubuntu prompt and returns
> the normal messages.
> For example.
> 
>> system("date")Thu Jun 30 21:48:20 UTC 2011
> 
> However when i try to store this return(something i need to do for my
> purposes) nothing is stored(or at least not what shown on the R prompt)
> 
>> store<-system("date")Thu Jun 30 21:49:27 UTC 2011>
store[1] 0
> 
> How do i capture the return of system()?
> 
> Thanks R-world,
> 
> John Dennison

See the 'intern' argument:
> system("date", intern = TRUE)
[1] "Thu Jun 30 17:06:12 CDT 2011"

This returns a character vector of the results of the command executed.

HTH,

Marc Schwartz