Togaware DATA MINING
Desktop Survival Guide
by Graham Williams
Google

Internet

You can check whether you have access to an Internet connection using the nsl function, checking for a specific hostname:

> nsl("www.r-project.org")
[1] "137.208.57.37"
> if(is.null(suppressWarnings(nsl("www.r-project.org")))) print("Connected?")



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