On Sun, 9 Apr 2006, Peter Dalgaard wrote:
[EMAIL PROTECTED] (Bjørn-Helge Mevik) writes:
make check of R-alpha_2006-04-08_r37675 fails on Debian GNU/Linux 3.1 running
on an Intel P4 computer.
version
_
platform i686-pc-linux-gnu
arch i686
os linux-gnu
system i686, linux-gnu
status alpha
major 2
minor 3.0
year 2006
month 04
day 08
svn rev 37675
language R
version.string Version 2.3.0 alpha (2006-04-08 r37675)
I'm using ATLAS with the SSE2 extensions, and get the same error with ATLAS
3.2.1 (packages atlas2-* 3.2.1ln-15 in Debian) and 3.6.0 (packages atlas3-*
3.6.0-19 in Debian). I've also tried without external BLAS (--without-blas),
but the error still occurs.
43 (0) $ ./configure
[...]
R is now configured for i686-pc-linux-gnu
Source directory: .
Installation directory: /usr/local
C compiler: gcc -g -O2 -std=gnu99
Fortran 77 compiler: g77 -g -O2
C++ compiler: g++ -g -O2
Fortran 90/95 compiler: g77 -g -O2
Interfaces supported: X11, tcltk
External libraries: readline, BLAS(ATLAS)
Additional capabilities: PNG, JPEG, iconv, MBCS, NLS
Options enabled: R profiling
Recommended packages: yes
44 (0) $ make
[...]
45 (0) $ make check
[...]
running code in 'd-p-q-r-tests.R' ... OK
comparing 'd-p-q-r-tests.Rout' to './d-p-q-r-tests.Rout.save' ...777,778d776
< Warning message:
< full precision was not achieved in 'qbeta'
make[3]: *** [d-p-q-r-tests.Rout] Error 1
[...]
46 (0) $ diff tests/d-p-q-r-tests.Rout.{save,fail}
3c3
< Version 2.3.0 alpha (2006-04-03 r37628)
---
Version 2.3.0 alpha (2006-04-08 r37675)
791a792,793
Warning message:
full precision was not achieved in 'qbeta'
1073c1075
< Time elapsed: 2.53 0.03 2.55 0 0
---
Time elapsed: 4.939 0.024 4.967 0 0
The (hopefully) interesting part of tests/d-p-q-r-tests.Rout.fail:
## Check q*(p* ( log ), log) = identity
All.eq(Rbeta, qbeta (log(Pbeta), shape1 = .8, shape2 = 2, log=TRUE))
[1] TRUE
Warning message:
full precision was not achieved in 'qbeta'
Please let me know if there is more I can provide to help trace this!
I suspect that this is related to recent changes in the zero-finder,
and that it is relatively benign. (If it is the effect that I'm
thinking of, then the warning is spurious, and it is mainly a matter
of whether we want to try to get rid of the warning or update the
.Rout.save file.)
I am not seeing it on my platforms (FC3 x86_64 and i686 Linux with gcc
3.4.5 and 4.1.0, i386 Windows and Solaris, with various compilers) and the
zero-finder changes postdate r37675 (and qbeta does not use it). I think
several other people are testing i686 Debian, including the daiuly CRAN
package checks ....
I suspect it is a real (and long-standing) problem of loss of accuracy
(2.2.1 did a check but did not report the results: it seems to be a
convergence failure looking at qbeta.c). What compiler version is this?
ATLAS is not involved. You'll need to trace qbeta.c.
--
Brian D. Ripley, [EMAIL PROTECTED]
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
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