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. Warren > In [3]: np.log2(np.exp2(-0.5849625007211563) + np.exp2(-53.584962500721154)) > Out[3]: -0.58496250072115608 > > Shouldn't the result at least behave nicely and just return the larger value? > _______________________________________________ > 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
