Re: [R] deleting a file

2004-11-16 Thread Uwe Ligges 
Achim Zeileis wrote:
On Tue, 16 Nov 2004 15:43:12 - Roger Gill wrote:

Dear all,
I have a very simple question.  Simple, that is, if you know the
answer.

Yes, look at
  ?file.remove
Z
... and file.path() in order to specify the location in an OS 
independent way.

Uwe Ligges


I wish to delete a file in a given directory after having first
checked its existence.  I issue the following commands
path<-'c:example/R/'
Thus creating the directory.
indicator<-length(grep(filename,path))
If indicator is greater than zero then the file exists.  Now I wish to
remove this file.  However, I would like to make the code compatible
for Linux/Windows and Macs.
In Linux I would issue the command
system('rm paste(path,'filename',sep='')')
and this works just fine.  It does not however work for windows, and I
have no idea whether it would work on a mac.
Is there a single command thay escapes me?
Best Wishes
Roger Gill
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Re: [R] deleting a file

2004-11-16 Thread Achim Zeileis 
On Tue, 16 Nov 2004 15:43:12 - Roger Gill wrote:

> Dear all,
> 
> I have a very simple question.  Simple, that is, if you know the
> answer.

Yes, look at
  ?file.remove
Z

> I wish to delete a file in a given directory after having first
> checked its existence.  I issue the following commands
> 
> path<-'c:example/R/'
> 
> Thus creating the directory.
> 
> indicator<-length(grep(filename,path))
> 
> If indicator is greater than zero then the file exists.  Now I wish to
> remove this file.  However, I would like to make the code compatible
> for Linux/Windows and Macs.
> 
> In Linux I would issue the command
> 
> system('rm paste(path,'filename',sep='')')
> 
> and this works just fine.  It does not however work for windows, and I
> have no idea whether it would work on a mac.
> 
> Is there a single command thay escapes me?
> 
> Best Wishes
> 
> Roger Gill
> 
> __
> [EMAIL PROTECTED] mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide!
> http://www.R-project.org/posting-guide.html
>

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Re: [R] deleting a file

2004-11-16 Thread Roger D. Peng 
You may be interested in one of dir.create(), file.exists(), or unlink().
-roger
Roger Gill wrote:
Dear all,
I have a very simple question.  Simple, that is, if you know the answer.
I wish to delete a file in a given directory after having first checked its
existence.  I issue the following commands
path<-'c:example/R/'
Thus creating the directory.
indicator<-length(grep(filename,path))
If indicator is greater than zero then the file exists.  Now I wish to
remove this file.  However, I would like to make the code compatible for
Linux/Windows and Macs.
In Linux I would issue the command
system('rm paste(path,'filename',sep='')')
and this works just fine.  It does not however work for windows, and I have
no idea whether it would work on a mac.
Is there a single command thay escapes me?
Best Wishes
Roger Gill
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--
Roger D. Peng
http://www.biostat.jhsph.edu/~rpeng/
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Re: [R] deleting a file

2004-11-16 Thread Jeff Gentry 
> In Linux I would issue the command
> system('rm paste(path,'filename',sep='')')
> and this works just fine.  It does not however work for windows, and I have
> no idea whether it would work on a mac.
> Is there a single command thay escapes me?

Yes.

help("file.remove")

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[R] deleting a file

2004-11-16 Thread Roger Gill 
Dear all,

I have a very simple question.  Simple, that is, if you know the answer.

I wish to delete a file in a given directory after having first checked its
existence.  I issue the following commands

path<-'c:example/R/'

Thus creating the directory.

indicator<-length(grep(filename,path))

If indicator is greater than zero then the file exists.  Now I wish to
remove this file.  However, I would like to make the code compatible for
Linux/Windows and Macs.

In Linux I would issue the command

system('rm paste(path,'filename',sep='')')

and this works just fine.  It does not however work for windows, and I have
no idea whether it would work on a mac.

Is there a single command thay escapes me?

Best Wishes

Roger Gill

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