deleting a file

On Tue, 16 Nov 2004 15:43:12 -0000 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