Use try() or tryCatch() to let your loop continue looking for more files after download.file() throws an error.
Bill Dunlap Spotfire, TIBCO Software wdunlap tibco.com > -----Original Message----- > From: r-help-boun...@r-project.org > [mailto:r-help-boun...@r-project.org] On Behalf Of Rolf Turner > Sent: Monday, April 25, 2011 3:30 PM > To: Wendy Han > Cc: r-help@r-project.org > Subject: Re: [R] About How to check if a html directory exists > > On 26/04/11 05:52, Wendy Han wrote: > > Dear all, > > > > > > > > I want to let R automatically download available files from > a website in > > certain folders. Since the files I need, if exist, are in a certain > > directory, I used download.file() function with a > predesigned directory. > > However, some of the folders do not have the file I want. > When this occurs, > > my program returns error and terminates. So I wonder if > there is any way > > that I can check if a directory exists before downloading > that file. I > > appreciate your help! > > Not quite sure I understand your question, but I think that the > file.info() function will provide what you need. Check out > ?file.info. > See also ?files and ?file.access. > > cheers, > > Rolf Turner > > ______________________________________________ > R-help@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide > http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. > ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
