31 Mar
2010
31 Mar
'10
7:36 p.m.
On Wed, Mar 31, 2010 at 4:15 PM, T J tjhnson@gmail.com wrote:
On Wed, Mar 31, 2010 at 1:21 PM, Charles R Harris charlesr.harris@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