[R] deleting a file

[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/