Hi I wrote a script which retrieves links from websites and loads them with scan:
... website<-tolower(scan(current.pages[i], what="character", sep="\n", quiet=TRUE)) ... However occasionally, the script finds broken links, such as <http://www.google.com/test>. when the script tries to access such websites, the repeat loop breaks and I get the error message Error in file(file, "r") : unable to open connection In addition: Warning message: cannot open: HTTP status was '404 Not Found' Now my question: is there a way to test whether the target of a link exists that does not result in an error and, thus, discontinues my loop? I looked at the help files for files, scans, connections, and did a search for "404?' in th archives but couldn't find anything. I work with R 2.3.1 patched on Windows XP (both Home and Prof) and would appreciate any pointers ... Thanks a lot, STG ______________________________________________ R-help@stat.math.ethz.ch 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.
