On Mon, 23, Oct, 2006 at 11:50:27AM +0100, Mark Hymers spoke thus.. > Hi, > > I've just done a Mac OS X PPC build of the SVN trunk and am getting this > failure too. <snip> > FAIL: Ticket #112 </snip>
I've just been looking into this a bit further (though I may be heading
down the wrong road) and come across this which doesn't exactly look
right. Again this is on a PPC Mac OS X 10.4 install:
In [1]: import numpy
In [2]: numpy.__version__
Out[2]: '1.0.dev3390'
In [3]: print numpy.finfo(numpy.float32).min, numpy.finfo(numpy.float32).max,
numpy.finfo(numpy.float32).eps
-3.40282346639e+38 3.40282346639e+38 1.19209289551e-07
In [4]: print numpy.finfo(numpy.float64).min, numpy.finfo(numpy.float64).max,
numpy.finfo(numpy.float64).eps
-1.79769313486e+308 1.79769313486e+308 2.22044604925e-16
In [5]: print numpy.finfo(numpy.float128).min, numpy.finfo(numpy.float128).max,
numpy.finfo(numpy.float128).eps
Warning: overflow encountered in add
Warning: invalid value encountered in subtract
Warning: invalid value encountered in subtract
Warning: overflow encountered in add
Warning: invalid value encountered in subtract
Warning: invalid value encountered in subtract
9223372034707292160.0 -9223372034707292160.0 1.38178697010200053743e-76
Anyone got any comments /thoughts on this? Should I file it as a bug?
I just tested this on an x86 Linux box (running Debian though that
should be irrelevant) and numpy.float128 doesn't exist on x86 Linux
but float96 does gives:
>>> print numpy.finfo(numpy.float96).min, numpy.finfo(numpy.float96).max,
>>> numpy.finfo(numpy.float96).eps
-1.18973149535723176502e+4932 1.18973149535723176502e+4932
1.08420217248550443401e-19
which seems right.
Any ideas?
Cheers,
Mark
--
Mark Hymers <mark at hymers dot org dot uk>
"The relationship between journalists and politicians has often been likened
to that between a dog and a lamp post, although I have never worked out who
is supposed to be which."
Nick Assinder, BBC Online Political Correspondent
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