On Tue, 9 Feb 2010, Greg Snow wrote:

Timing can be an issue.  You need to set the environment variables before 
accessing the internet for the 1st time in each R session.  If you get the 
error, then try setting the variables, it will not work.

For my situation I have http_proxy and http_proxy_user set for the entire 
computer (in windows you do this through the control panel).

If you want to go with the .Renviron route, just type: Sys.getenv('home')
At the command prompt and it will tell you what your "Home" folder is.  Just 
create the .Renviron file in that folder.

I believe the OP specified internet2.dll on installation. It might be better not to do so ... otherwise you are at the mercy of IE internals. The rw-FAQ does say (Q2.19)

(a) Use the alternative internet2.dll by starting R with the flag --internet2 (see How do I install R for Windows?) or calling setInternet2(TRUE). These cause R to use the Internet Explorer internals.. Note that this does not work with proxies that need authentication.

--
Gregory (Greg) L. Snow Ph.D.
Statistical Data Center
Intermountain Healthcare
greg.s...@imail.org
801.408.8111


-----Original Message-----
From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-
project.org] On Behalf Of Van Wyk, Jaap
Sent: Monday, February 08, 2010 10:11 PM
To: r-help@r-project.org
Subject: Re: [R] Installation require proxy settings (continued)
Importance: High

Thanks to Greg and Michael for their advice.
I have tried all these possibilities (and other); nothing seems to
work; I persistently get the message:
In open.connection(con, "r") :
  cannot open: HTTP status was '407 Proxy Authentication Required'
It seems as if "proxy authentication required" is causing the problem.
It seems I have to set up an .Renviron file, but I am still learning R,
and cannot find such a file.
Would it help, and how do I create it (it that is a possible
alternative to try).
Thanks for any comments.
Jacob


Jacob L van Wyk
Department of Statistics
University of Johannesburg (APK)
PO Box 524, Auckland Park, 2006
Office ph: 011 559 3080
Fax: 011 559 2499


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--
Brian D. Ripley,                  rip...@stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
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Oxford OX1 3TG, UK                Fax:  +44 1865 272595

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