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

From: Wendy Han <wendyhan08_at_gmail.com>
Date: Mon, 25 Apr 2011 12:52:41 -0500

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!



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