digitalmars.D.announce - Mister Math is wanted!
- Ilya Yaroshenko (4/4) Feb 26 2015 Hello all!
- Andrei Alexandrescu (13/17) Feb 26 2015 Unfortunate overlap in functionality is unfortunate.
- Ilya Yaroshenko (13/26) Feb 27 2015 Would one of the following solutions be fortunate ?
- Ilya Yaroshenko (6/36) Feb 27 2015 Probably, I have found good solution. Summator struct can be
Hello all! Python's fsum is ready for D : https://github.com/D-Programming-Language/phobos/pull/2991 Destroy!
Feb 26 2015
On 2/26/15 5:34 AM, Ilya Yaroshenko wrote:Hello all! Python's fsum is ready for D : https://github.com/D-Programming-Language/phobos/pull/2991 Destroy!Unfortunate overlap in functionality is unfortunate. $ git grep -i kahan std/algorithm/iteration.d:$(D sum) uses the $(WEB en.wikipedia.org/wiki/Kahan_summation, std/algorithm/iteration.d:Kahan summation) algorithm.) std/algorithm/iteration.d: return sumKahan!E(seed, r); std/algorithm/iteration.d:// Kahan algo http://en.wikipedia.org/wiki/Kahan_summation_algorithm std/algorithm/iteration.d:private auto sumKahan(Result, R)(Result result, R r) $ _ Andrei
Feb 26 2015
Unfortunate overlap in functionality is unfortunate. $ git grep -i kahan std/algorithm/iteration.d:$(D sum) uses the $(WEB en.wikipedia.org/wiki/Kahan_summation, std/algorithm/iteration.d:Kahan summation) algorithm.) std/algorithm/iteration.d: return sumKahan!E(seed, r); std/algorithm/iteration.d:// Kahan algo http://en.wikipedia.org/wiki/Kahan_summation_algorithm std/algorithm/iteration.d:private auto sumKahan(Result, R)(Result result, R r) $ _ AndreiWould one of the following solutions be fortunate ? I. Use alias of fsum!(Summation. Appropriate) for floating version of std.algorithm.sum. Appropriate algorithm performs D Pairwise summation for random access ranges. Otherwise performs D KBN summation of floating point and complex numbers and Kahan summation of user defined types. or II. Move this submodule to std.algorithm.iteration. or III. Remove Kahan (including KBN and KB2) and Pairwise algorithms from fsum, and use only Precise algorithm for std.numeric.
Feb 27 2015
On Friday, 27 February 2015 at 09:27:49 UTC, Ilya Yaroshenko wrote:Probably, I have found good solution. Summator struct can be represented in std.numeric and std.algorithm.sum can be extended by the new functionality. So there will be no overlap in functionality.Unfortunate overlap in functionality is unfortunate. $ git grep -i kahan std/algorithm/iteration.d:$(D sum) uses the $(WEB en.wikipedia.org/wiki/Kahan_summation, std/algorithm/iteration.d:Kahan summation) algorithm.) std/algorithm/iteration.d: return sumKahan!E(seed, r); std/algorithm/iteration.d:// Kahan algo http://en.wikipedia.org/wiki/Kahan_summation_algorithm std/algorithm/iteration.d:private auto sumKahan(Result, R)(Result result, R r) $ _ AndreiWould one of the following solutions be fortunate ? I. Use alias of fsum!(Summation. Appropriate) for floating version of std.algorithm.sum. Appropriate algorithm performs D Pairwise summation for random access ranges. Otherwise performs D KBN summation of floating point and complex numbers and Kahan summation of user defined types. or II. Move this submodule to std.algorithm.iteration. or III. Remove Kahan (including KBN and KB2) and Pairwise algorithms from fsum, and use only Precise algorithm for std.numeric.
Feb 27 2015