[R] Test internet presence

[Gregor Gorjanc]

Hello useRs!

I have a small package and I need internet access for examples. Of
course it works fine when I have internet access, but not otherwise. I
remember I saw a way to test availability of internet access, but I can
not find it now in archives. Can anyone here help me?

Thanks!

-- 
Lep pozdrav / With regards,
    Gregor Gorjanc

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University of Ljubljana     PhD student
Biotechnical Faculty
Zootechnical Department     URI: http://www.bfro.uni-lj.si/MR/ggorjan
Groblje 3                   mail: gregor.gorjanc <at> bfro.uni-lj.si

SI-1230 Domzale             tel: +386 (0)1 72 17 861
Slovenia, Europe            fax: +386 (0)1 72 17 888

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"One must learn by doing the thing; for though you think you know it,
 you have no certainty until you try." Sophocles ~ 450 B.C.