Re: [Rd] R 2.6.0 make check fails on SGI origin 350 and

From: Martin Maechler <maechler_at_stat.math.ethz.ch>
Date: Thu, 8 Nov 2007 18:43:57 +0100

Thanks a lot Kamil,
for the confirmation:

>>>>> "kM" == kamil Marcinkowski <kamil_at_ualberta.ca> >>>>> on Thu, 8 Nov 2007 09:41:05 -0700 writes:

    kM> Hello list
    kM> Here are the results of the tests on R 2.6.0 patched:

>> R version 2.6.0 Patched (2007-11-05 r43362)
>> Copyright (C) 2007 The R Foundation for Statistical Computing
>> ISBN 3-900051-07-0
    kM> ...

>> > str(.Machine, digits=7)
>> List of 18
>> $ double.eps : num 2.220446e-16
>> $ double.neg.eps : num 1.110223e-16
>> $ double.xmin : num 2.225074e-308
>> $ double.xmax : num 1.797693e+308
>> $ double.base : int 2
>> $ double.digits : int 53
>> $ double.rounding : int 2
>> $ double.guard : int 0
>> $ double.ulp.digits : int -52
>> $ double.neg.ulp.digits: int -53
>> $ double.exponent : int 11
>> $ double.min.exp : int -1022
>> $ double.max.exp : int 1024
>> $ integer.max : int 2147483647
>> $ sizeof.long : int 4
>> $ sizeof.longlong : int 8
>> $ sizeof.longdouble : int 16
>> $ sizeof.pointer : int 4
>>

>> > dpois( 10, 10^(-290:-310), log=TRUE)
>> [1] -6692.601 -6715.627 -6738.653 -6761.679 -6784.705 -6807.730 -6830.756
>> [8] -6853.782 -6876.808 -6899.834 -6922.860 -6945.886 -6968.911 -6991.937
>> [15] -7014.963 -7037.989 -7061.015 -7084.041 -Inf -Inf -Inf
>>

>> > All.eq(dpois( 10*1:2, 3e-308, log=TRUE), c(-7096.08037610806,
>> -14204.2875435307))
>> Error: could not find function "All.eq"

    kM> I copied the All.eq function from d-p-q-r-tests.R file and rerun he     kM> test:

>> > All.eq <- function(x,y) {
>> all.equal.numeric(x,y, tolerance= 64*.Machine$double.eps,
>> scale = max(0, mean(abs(x), na.rm=TRUE)))
>> }
>> + + + >
>> > All.eq(dpois( 10*1:2, 3e-308, log=TRUE), c(-7096.08037610806,
>> -14204.2875435307))
>> [1] TRUE
Very good.

So after, the SGI only has slight problems with so-called denormalized numbers; this is not considered a big problem and the next versions of R will have the check above, instead of the one that gave an error.

Thank you again for your feedback!
Regards,
Martin Maechler, ETH Zurich

    kM> Cheers,

    kM> Kamil

    kM> Kamil Marcinkowski                   Westgrid System Administrator
    kM> kamil_at_ualberta.ca                     University of Alberta site
    kM> Tel.780 492-0354                     Research Computing Support
    kM> Fax.780 492-1729                     Academic ICT
    kM> Edmonton, Alberta, CANADA University of Alberta

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