[R] About How to check if a html directory exists

[Rolf Turner]

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