I think you'll need to roll your own using tryCatch() around open(). Michael
On Jul 18, 2012, at 5:09 AM, Berry Boessenkool <berryboessenk...@hotmail.com> wrote: > > > Hi all, > > I'm working on a function that reads online data that is only available to > certain IPs. It then writes a subset of the data into a file. > So whenever I'm logged in elsewhere or am not connected to the internet, I > get an error, and the function is terminated. > I want it to rather print a message into the file. > > Is there any way to test whether a connection can be opened? > Analogous to isOpen something like canOpen... > Or would I want to look into the error handling options? > > By the way, the data is the internet volume used so far, which I want to > track regularly (on every R-Start via Rprofile). > My brother (a computer schientist in progress) did not know a solution, so I > set out to try this with R - which I got to work fine (except the above > mentioned). > "R beats java", I told him, to which he responded nothing ;-) > Isn't it amazing, what one can do with R? > > Thanks ahead, > Berry Boessenkool > > > [[alternative HTML version deleted]] > > ______________________________________________ > R-help@r-project.org 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. ______________________________________________ R-help@r-project.org 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.
