Description Usage Arguments Value Author(s)
x must start with http://, ftp://, or file:// See also download.file
1 | is.url(x)
|
x |
a character vector. |
a logical vector of length x. values are TRUE if the entry looks like a URL. NB the URL's are not checked for 404 (dead links) errors.
Mark Cowley, 2009-12-11
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