On 03/11/15 01:41, Marc Schwartz wrote:
On Nov 2, 2015, at 6:00 AM, John Kane <jrkrid...@inbox.com> wrote:
A rather silly question but I went to install a new package this
morning and as usual a list of CRAN mirrors appeared but the
Canadian ones had disappeared.
Is this some peculiarity of my system (Ubuntu 14.10 with R version
3.2.2) or a new policy for R?
John Kane Kingston ON Canada
Hi John,
Presuming that the CRAN mirror list online is current, there do not
appear to be any CRAN mirrors in Canada which support secure HTTP
(HTTPS), which is now the default in 3.2.2.
See the announcement from August 14 (SIGNIFICANT USER-VISIBLE CHANGES
and NEW FEATURES):
https://stat.ethz.ch/pipermail/r-announce/2015/000589.html
See ?chooseCRANmirror for more information.
When you get a list of mirrors to select, by default the top of the
list will include mirrors that support HTTPS. The last entry on the
list should be (HTTP mirrors). Click that and it will bring up a list
of additional mirrors, including Canadian locations, that support
HTTP.
Out of idle curiosity I started playing around with this stuff and ran
into a puzzling phenomenon.
When I execute
chooseCRANmirror()
I get an error message:
Error in download.file(url, destfile = f, quiet = TRUE) :
unsupported URL scheme
Nevertheless a menu appears, with "(HTTP mirrors)" at the bottom, just
as you said.
I don't understand why chooseCRANmirror() still works despite the error
being thrown.
Tracing through what chooseCRANmirror() does I reduced the problem to:
u <- "https://cran.r-project.org/CRAN_mirrors.csv";
download.file(u,destfile="junk")
which throws the error
Error in download.file(u, destfile = "junk") : unsupported URL scheme
If I replace the "https" in the url by "http" then things run without an
error being thrown.
There is no immediate problem for me, since I can install packages from
CRAN OK, using my usual New Zealand mirror (which is an http mirror).
If I try to use one of the https mirrors that are shown by
chooseCRANmirror() (e.g. Austria) then I get a warning:
Warning: unable to access index for repository
https://cran.r-project.org/src/contrib
and the install goes back to using the New Zealand mirror.
So there seems to be something not quite right with my system or with my
installation of R. Although, as I said, there is no immediate problem,
the fact that something is not quite right worries me.
Can you (Marc) or anyone else suggest what might be the problem and how
to fix it, or at least track it down a bit more explicitly?
Here's my
> sessionInfo()
R version 3.2.2 (2015-08-14)
Platform: x86_64-pc-linux-gnu (64-bit)
Running under: Fedora 17 (Beefy Miracle)
locale:
[1] LC_CTYPE=en_NZ.utf8 LC_NUMERIC=C
[3] LC_TIME=en_NZ.utf8 LC_COLLATE=en_NZ.utf8
[5] LC_MONETARY=en_NZ.utf8 LC_MESSAGES=en_NZ.utf8
[7] LC_PAPER=en_NZ.utf8 LC_NAME=C
[9] LC_ADDRESS=C LC_TELEPHONE=C
[11] LC_MEASUREMENT=en_NZ.utf8 LC_IDENTIFICATION=C
attached base packages:
[1] stats graphics grDevices utils datasets methods base
other attached packages:
[1] misc_0.0-16
loaded via a namespace (and not attached):
[1] deldir_0.1-9 Matrix_1.1-4 mgcv_1.8-7
[4] abind_1.4-0 spatstat_1.43-0.007 nlme_3.1-121
[7] grid_3.2.2 polyclip_1.3-1 lattice_0.20-33
[10] goftest_1.0-2 tensor_1.5
Ta.
cheers,
Rolf
--
Technical Editor ANZJS
Department of Statistics
University of Auckland
Phone: +64-9-373-7599 ext. 88276
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