On Thu, Apr 1, 2010 at 1:22 AM, <josef.p...@gmail.com> wrote: > On Thu, Apr 1, 2010 at 1:17 AM, Charles R Harris > <charlesr.har...@gmail.com> wrote: >> >> >> On Wed, Mar 31, 2010 at 6:08 PM, <josef.p...@gmail.com> wrote: >>> >>> On Wed, Mar 31, 2010 at 7:37 PM, Warren Weckesser >>> <warren.weckes...@enthought.com> wrote: >>> > T J wrote: >>> >> On Wed, Mar 31, 2010 at 1:21 PM, Charles R Harris >>> >> <charlesr.har...@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. >>> >>> >>> >>> >>> np.logaddexp2(-0.5849625007211563, -53.584962500721154) >>> nan >>> >>> np.logaddexp2(-1.5849625007211563, -53.584962500721154) >>> -1.5849625007211561 >>> >>> >>> np.version.version >>> '1.4.0' >>> >>> WindowsXP 32 >>> >> >> What compiler? Mingw? > > yes, mingw 3.4.5. , official binaries release 1.4.0 by David
sse2 Pentium M > > Josef > >> >> Chuck >> >> >> _______________________________________________ >> NumPy-Discussion mailing list >> NumPy-Discussion@scipy.org >> http://mail.scipy.org/mailman/listinfo/numpy-discussion >> >> > _______________________________________________ NumPy-Discussion mailing list NumPy-Discussion@scipy.org http://mail.scipy.org/mailman/listinfo/numpy-discussion
