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?")



Copyright © 2004-2006 [email protected]
Support further development through the purchase of the PDF version of the book.
Brought to you by Togaware.