From ripley at stats.ox.ac.uk  Wed Mar 26 08:39:31 2008
From: ripley at stats.ox.ac.uk (Prof Brian Ripley)
Date: Wed, 26 Mar 2008 07:39:31 +0000 (GMT)
Subject: [Rd] R 64 on Intel Mac check problem
In-Reply-To: <3ba562220803251741q3387d377w3692d975e2cbb7b2@mail.gmail.com>
References: <3ba562220803251403r7ebded28qa751421030a6ae59@mail.gmail.com>
	<alpine.LFD.1.00.0803252231230.29859@gannet.stats.ox.ac.uk>
	<3ba562220803251741q3387d377w3692d975e2cbb7b2@mail.gmail.com>
Message-ID: <alpine.LFD.1.00.0803260731020.26496@auk.stats.ox.ac.uk>

On Tue, 25 Mar 2008, Georgios Marentakis wrote:

> many thanks for the response.
> I tried compiling without optimization and it still gives me the same
> problem.
> Would you think it is something related to the package? Could it be that I
> should use another version  of the particular package than the one included?
> Or could it be something with the way the results are compared?
> Would you suggest I can trust this version of R for performing the
> statistical analysis I am after?

Note that your compiler is not the same as mine (from Xcode 3.0).  If it 
fails without optimization, I would not trust it. I don't know though 
which it is: http://cran.stat.sfu.ca/with is not a valid URL, and I don't 
know which instructions you followed (assuming they are somewhere on 
CRAN).

Simon Urbanek is making available quad-arch experimental builds of 
R-devel, and I suggest you try one of those.  (I haven't, but then I have 
other, reliable, 64-bit platforms and am only doing this to test changes 
to R.)

> many thanks,
> georgios
>
>
> On Tue, Mar 25, 2008 at 6:39 PM, Prof Brian Ripley <ripley at stats.ox.ac.uk>
> wrote:
>
>> I saw this yesterday, on my newly reinstalled iMac (10.5.2), with the
>> Xcode compiler + gfortran from R 2.6.2.
>>
>> It looks very like a compiler bug: if I insert a printf statement in
>> stem.c I get the correct answer, and if I compile src/appl/stem.c without
>> optimization I get the correct answer.
>>
>> So, I suggest lowering the optimization level, but the worry always is
>> that if you have one piece of code miscompiled there may be others.
>>
>> On Tue, 25 Mar 2008, Georgios Marentakis wrote:
>>
>>> Dear all, I have been following the instructions on
>>> http://cran.stat.sfu.ca/with the intention to install R with 64 bits
>>> support on an 8 core Intel Mac
>>> with 6 GB of memory. I am doing this so I can run an analysis that
>> requires
>>> 1.6 gB of memory allocation and would not run on 32 bit version of R as
>> I
>>> was advised and experienced.
>>> I have installed gcc 4.2 and gfortran 4.2 from the available sources on
>> the
>>> web page and am using the copy and paste guide on the page.
>>>
>>> Now everything seems to be going fine until the point where the R
>> packages
>>> are tested. In particular when the regression tests are run I get the
>>> following.
>>>
>>> running regression tests
>>> running code in 'reg-tests-1.R' ...\c
>>> OK
>>> running code in 'reg-tests-2.R' ...\c
>>> OK
>>> comparing 'reg-tests-2.Rout' to './reg-tests-2.Rout.save' ...\c
>>> 3756c3756
>>> <   The decimal point is 1 digit(s) to the right of the |
>>> ---
>>>>   The decimal point is at the |
>>> 3762c3762
>>> <   The decimal point is 1 digit(s) to the right of the |
>>> ---
>>>>   The decimal point is 1 digit(s) to the left of the |
>>> 3764c3764
>>> <   0 | 1111111111
>>> ---
>>>>   1 | 0000000000
>>> make[3]: *** [reg-tests-2.Rout] Error 1
>>> make[2]: *** [test-Reg] Error 2
>>> make[1]: *** [test-all-basics] Error 1
>>> make: *** [check] Error 2
>>>
>>> Would any of you be able to point me to what is the reason for this?
>>> thanks,
>>> georgios
>>>
>>>       [[alternative HTML version deleted]]
>>>
>>> ______________________________________________
>>> R-devel at r-project.org mailing list
>>> https://stat.ethz.ch/mailman/listinfo/r-devel
>>>
>>
>> --
>> Brian D. Ripley,                  ripley at stats.ox.ac.uk
>> Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/<http://www.stats.ox.ac.uk/%7Eripley/>
>> University of Oxford,             Tel:  +44 1865 272861 (self)
>> 1 South Parks Road,                     +44 1865 272866 (PA)
>> Oxford OX1 3TG, UK                Fax:  +44 1865 272595
>>
>
> 	[[alternative HTML version deleted]]
>
> ______________________________________________
> R-devel at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-devel
>

-- 
Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272866 (PA)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595



[Rd] R 64 on Intel Mac check problem
Prof Brian Ripley