Shouldn't the URL be (for R 1.8.1 on Windows):
http://cran.r-project.org/bin/windows/contrib/1.8/PACKAGES
There is no URL as listed below, which is presumably why the error message.
The URL geven below indicates that the code in the base package is R <= 1.6.x. These outdated versions are not supported any more.
Uwe Ligges
Was options()$CRAN changed improperly or is there some other Windows specific issue that is escaping me at the moment?
BTW, you should upgrade to R 1.9.1, as you are two versions behind at this point.
HTH,
Marc Schwartz
On Wed, 2004-07-28 at 23:08, Liaw, Andy wrote:
1. Could it be that your computer is behind a firewall? If so, try reading the R for Windows FAQ.
2. Please ask R-related question on R-help instead of S-news.
Andy
From: cheng wu
Hi, Andy
Thank you for your answer.
Why I can't load CRAN packages?
the error message is:
{a <- CRAN.packages()
+ install.packages(select.list(a[,1],,TRUE), .libPaths()[1], available=a)}
trying URL `http://cran.r-project.org/bin/windows/contrib/PACKAGES'
unable to connect to 'cran.r-project.org'.
Error in download.file(url = paste(contriburl, "PACKAGES", sep = "/"), : cannot open URL `http://cran.r-project.org/bin/windows/contrib/PACKAGES'
From: "Chushu Gu" <[EMAIL PROTECTED]> To: "cheng wu" <[EMAIL PROTECTED]> Subject: Fw: [S] tree function in R language Date: Wed, 28 Jul 2004 09:14:48 -0400
----- Original Message -----
From: "Liaw, Andy" <[EMAIL PROTECTED]>
To: "'chushu Gu'" <[EMAIL PROTECTED]>;
<[EMAIL PROTECTED]>
Sent: Tuesday, July 27, 2004 11:22 PM Subject: RE: [S] tree function in R language
Have you read the (latest edition of the) book for which
the package you
are
using supports? There are differences in S-PLUS and R
(and the 4th
edition
of MASS supports both, thus ought to tell you this particular
difference
between the two). tree() in S-PLUS is written originally
by Clark and
Pregibon. If you want that functionality in R, you need
to load the
`tree'
package (available on CRAN), which is an independent
implementation by one
of the co-authors of MASS.
Another hint: Look in the `scripts' subdirectory of where
the `MASS'
package
is installed.
Andy
From: chushu Gu
Hi all,
I am using R 1.8.1, I have the following code,
library(MASS) data(iris) ir.tr <- tree(Species ~., iris) ir.tr summary(ir.tr)
I got the following message:
Error: couldn't find function "tree"
I don't the reason, as I already load the library "MASS".
Could anyone tell me the possible reasons?
Thanks,
Chushu Gu
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