[Numpy-discussion] math.fsum() like ufunc for numpy

Julian Taylor jtaylor.debian at googlemail.com
Mon Dec 2 13:11:25 EST 2013

related this PR attempts to improve the accuracy of summation:
but math.fsum gives the exact result so it would a valuable ufunc even
when that PR is merged.

python3.4 will have yet another accurate summation in the statistics module:

On 02.12.2013 19:07, Nathaniel Smith wrote:
> I think that would be great. Technically what you'd want is a "gufunc".
> -n
> On Mon, Dec 2, 2013 at 9:44 AM, Daniele Nicolodi <daniele at grinta.net> wrote:
>> Hello,
>> there would be interest in adding a floating point accurate summation
>> function like Python's math.fsum() in the form of an ufunc to NumPy?
>> I had a look at the algorithm
>> (http://code.activestate.com/recipes/393090-binary-floating-point-summation-accurate-to-full-p/)
>> and it looks quite straightforward to implement. I can try to submit a
>> patch for it.
>> Cheers,
>> Daniele
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