On Wed, Mar 31, 2010 at 4:15 PM, T J <tjhn...@gmail.com> 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 > > In [3]: np.log2(np.exp2(-0.5849625007211563) + > np.exp2(-53.584962500721154)) > Out[3]: -0.58496250072115608 > > I don't see that
In [1]: np.logaddexp2(-0.5849625007211563, -53.584962500721154) Out[1]: -0.58496250072115619 In [2]: np.logaddexp2(-1.5849625007211563, -53.584962500721154) Out[2]: -1.5849625007211561 What system are you running on. Chuck
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