R help - Aug 2007 - It is possible to use a Shell command inside a R script?

Hi,

It is possible to use a shell command inside a R script?

I'm write a R script and I like to put somes shell commands inside to R. 
Somethink like: convert fig01.png fig01.xpm or sed ..., etc.

It is possible? How?

Thanks
Ronaldo
-- 
Acalme-se, s??o somente 0's e 1's
--
> Prof. Ronaldo Reis J?nior
|  .''`. UNIMONTES/Depto. Biologia Geral/Lab. de Ecologia
| : :'  : Campus Universit?rio Prof. Darcy Ribeiro, Vila Mauric?ia
| `. `'` CP: 126, CEP: 39401-089, Montes Claros - MG - Brasil
|   `- Fone: (38) 3229-8187 | ronaldo.reis em unimontes.br | chrysopa em
gmail.com
| http://www.ppgcb.unimontes.br/ | ICQ#: 5692561 | LinuxUser#: 205366

Hi,

see ?system

-- 
Henrique Dallazuanna
Curitiba-Paraná-Brasil
25° 25' 40" S 49° 16' 22" O

On 24/08/07, Ronaldo Reis Junior <chrysopa@gmail.com>
wrote:
>
> Hi,
>
> It is possible to use a shell command inside a R script?
>
> I'm write a R script and I like to put somes shell commands inside to
R.
> Somethink like: convert fig01.png fig01.xpm or sed ..., etc.
>
> It is possible? How?
>
> Thanks
> Ronaldo
> --
> Acalme-se, são somente 0's e 1's
> --
> > Prof. Ronaldo Reis Júnior
> |  .''`. UNIMONTES/Depto. Biologia Geral/Lab. de Ecologia
> | : :'  : Campus Universitário Prof. Darcy Ribeiro, Vila Mauricéia
> | `. `'` CP: 126, CEP: 39401-089, Montes Claros - MG - Brasil
> |   `- Fone: (38) 3229-8187 | ronaldo.reis@unimontes.br |
> chrysopa@gmail.com
> | http://www.ppgcb.unimontes.br/ | ICQ#: 5692561 | LinuxUser#: 205366
>
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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.
>
	[[alternative HTML version deleted]]

Ronaldo Reis Junior wrote:
> 
> It is possible to use a shell command inside a R script?
> 
> I'm write a R script and I like to put somes shell commands inside 
> to R. Somethink like: convert fig01.png fig01.xpm or sed ..., etc.
> 
> It is possible? How?
> 
?system

BTW, I found that using things directly in R is _much_
slower than creating a batch file and then running it.

For example, I had a directory with misnamed mp3 files,
and I wanted to use R to rename and copy them
to another directory. I tried to use file.copy, but it 
took too much time. Writing a batch file and then running
it was much faster.

Alberto Monteiro

On 8/24/2007 6:58 AM, Ronaldo Reis Junior wrote:
> Hi,
> 
> It is possible to use a shell command inside a R script?
> 
> I'm write a R script and I like to put somes shell commands inside to
R.
> Somethink like: convert fig01.png fig01.xpm or sed ..., etc.
The details and available functions depend on the platform, but you want 
to look at ?system, ?shell, and/or ?shell.exec.  (These all exist in 
Windows; on Unix-alikes, you probably won't have the latter two.)

Duncan Murdoch