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
> 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")
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 > > ______________________________________________ > R-help at stat.math.ethz.ch mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html >-- Roger D. Peng http://www.biostat.jhsph.edu/~rpeng/
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 > > ______________________________________________ > R-help at stat.math.ethz.ch mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide! > http://www.R-project.org/posting-guide.html >