Re: [boost] accurate sum accumulator (kahan)

Subject: Re: [boost] accurate sum accumulator (kahan)
From: John Maddock (boost.regex_at_[hidden])
Date: 2010-07-27 12:17:18

>>> This would be ideal - but doesn't accumulator already use 'sum' so it 
>>> would change behaviour of existing programs?
>>
>> Technically, of course it would, but aren't they getting the wrong answer 
>> currently?
>
> I tend to agree with Dave, so long as the kahan sum accumulator is a
> drop-in replacement for what we already have. Does it Just Work for
> integral types, too?

It's not required for integral types as these don't suffer from cancelation 
errors.

John.