On 10/6/2009 1:17 PM, Kjetil Halvorsen wrote:
On Tue, Oct 6, 2009 at 11:23 AM, Duncan Murdoch <murd...@stats.uwo.ca> wrote:
On 10/6/2009 10:34 AM, Jose Quesada wrote:
Robert Wilkins <iwritecode2 <at> gmail.com> writes:
Will R have more glitches on one operating system as opposed to
another, or is it pretty much the same?
robert
One important difference is that, if you are unsing large datasets and
need
memory, then windows is by far the worst. CRAN R is 32 bit and can only
address 1.5 Gb of memory (or something similar; I
don't really understand why).
By default, 32 bit Windows only gives 2 Gb for all the user processes to
share, and saves the rest of memory for itself. You can change this (see
the Windows FAQ), but the most you'll ever get is 3 Gb in 32 bit Windows,
_____and a bit under 4 Gb in 64 bit Windows.________
That sounds incredible. ¿Why so?
When running a 32 bit program, 64 bit Windows hides most of itself
outside the address space visible to the program, so almost all of the 4
Gb address space is available to the user. But no more: no matter how
much RAM you install, it's not possible to address it using a 32 bit
address.
Duncan Murdoch
Kjetil
Duncan Murdoch
While there's a 64-bit version of R for windows (revolution-computing.com)
I
would advise against using it, for several reasons. While revolution has
provided very nice packages to the community (e.g., foreach), the win-64
port as
of today is certainly the worst platform to do work on. Reasons:
(1) it's R 2.7.2
(2) Many important packages will never be ported
(3) Some packages (particularly those depending on Rjava) would not work
properly
(4) There's a proprietary repository, where most packages are outrageously
outdated. (5) Most help you find on R-help will not apply. Instead, you
have 'paid'
support. Said support is slow, and close to useless in most cases.
(6) Packages that rely on external tools (e.g., mysql) will take a lot of
work
to get going.
And of course, one have to pay for a yearly license, to have the privilege
to
work under the above conditions.
If you need 64-bit right now, my advice is to switch to basically any
other
platform.
Note: this may change any time, since they are working on a continuous
build
that will keep the releases in sync with mainstream R.
Jose Quesada, PhD.
Max Planck Institute, Human Development, Berlin
http://www.josequesada.name/
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and provide commented, minimal, self-contained, reproducible code.
______________________________________________
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
