About How to check if a html directory exists
On Mon, 2011-04-25 at 12:52 -0500, Wendy Han wrote:
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!
You could use the try() command to catch the download.file() error and, if there is one, handle it accordingly. See help(try) Regards, Jerome