[Numpy-discussion] Bug in logaddexp2.reduce
David Cournapeau
david at silveregg.co.jp
Wed Mar 31 22:02:46 EDT 2010
Ryan May wrote:
> On Wed, Mar 31, 2010 at 5:37 PM, Warren Weckesser
> <warren.weckesser at enthought.com> wrote:
>> T J wrote:
>>> On Wed, Mar 31, 2010 at 1:21 PM, Charles R Harris
>>> <charlesr.harris at gmail.com> wrote:
>>>
>>>> Looks like roundoff error.
>>>>
>>>>
>>> So this is "expected" behavior?
>>>
>>> In [1]: np.logaddexp2(-1.5849625007211563, -53.584962500721154)
>>> Out[1]: -1.5849625007211561
>>>
>>> In [2]: np.logaddexp2(-0.5849625007211563, -53.584962500721154)
>>> Out[2]: nan
>>>
>> Is any able to reproduce this? I don't get 'nan' in either 1.4.0 or
>> 2.0.0.dev8313 (32 bit Mac OSX). In an earlier email T J reported using
>> 1.5.0.dev8106.
Having the config.h as well as the compilation options would be most
useful, to determine which functions are coming from the system, and
which one are the numpy ones,
cheers,
David
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