[R] system()

[Rui Barradas]

Hello,

Thanks, and sorry for the bug.
I used what the op was using [system()] without checking if it worked. 
shell() worked in Windows 7/R 3.1.0.

sessionInfo()
R version 3.1.0 (2014-04-10)
Platform: x86_64-w64-mingw32/x64 (64-bit)

locale:
[1] LC_COLLATE=Portuguese_Portugal.1252 
LC_CTYPE=Portuguese_Portugal.1252
[3] LC_MONETARY=Portuguese_Portugal.1252 LC_NUMERIC=C 

[5] LC_TIME=Portuguese_Portugal.1252

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base


Rui Barradas

Em 15-04-2014 02:26, Daniel Nordlund escreveu:
>> -----Original Message-----
>> From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org]
>> On Behalf Of Rui Barradas
>> Sent: Monday, April 14, 2014 12:09 PM
>> To: Doran, Harold; r-help at r-project.org
>> Subject: Re: [R] system()
>>
>> Hello,
>>
>> Try instead
>>
>> command <- paste(aa, fnm)
>> system(command)
>>
>> And read the help page for ?paste
>>
>> Hope this helps,
>>
>> Rui Barradas
>>
>>
>> Em 14-04-2014 20:02, Doran, Harold escreveu:
>>> I need to send a system command to another program from within R but
>> have a small hangup
>>>
>>> I'm trying to do something like this
>>>
>>> system("notepad myfile.txt")
>>>
>>> But, more generally this is happening to multiple files, so I loop over
>> thousands of files. For purposes of an example, my code is something like
>> this, which does not work
>>>
>>> aa <- 'notepad.exe'
>>> fnm <- 'myfile.txt'
>>> system("aa fnm")
>>>
>>> Any suggestions?
>>> Harold
>>>
>
> Harold,
>
> you haven't said what OS you are running under, but given that your example program was notepad.exe I am going to guess some flavor of MS Windows.  The suggestion to use paste() is necessary, but it will probably not be sufficient to solve your problem.  The commands suggested
>
>> command <- paste(aa, fnm)
>> system(command)
>
> freezes R on my Win 7 Pro x64 box using either 64-bit R-3.0.3 or R-3.1.0.  You might try switching to shell() instead of system()
>
>> command <- paste(aa, fnm)
>> shell(command)
>
> However, it all depends on what programs you are trying to run and what behavior you expect.
>
>
> Dan
>
> Daniel Nordlund
> Bothell, WA USA
>
>
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