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[Octave-bug-tracker] [bug #49091] MinGW std::acosh less accurate than Li
From: |
Nicholas Jankowski |
Subject: |
[Octave-bug-tracker] [bug #49091] MinGW std::acosh less accurate than Linux versions |
Date: |
Wed, 3 Aug 2022 11:37:45 -0400 (EDT) |
Follow-up Comment #17, bug #49091 (project octave):
it appears to be windows specific. currently on both v6.4 and v7.2 I get:
>> z = acosh (10i);
>> printf ("Octave acosh(10i) = %.16f + %.16fi\n", real (z), imag (z));
Octave acosh(10i) = 2.9982229502979698 + 1.5707963267948966i
>> z = acosh (-10i);
>> printf ("Octave acosh(-10i) = %.16f + %.16fi\n", real (z), imag (z));
Octave acosh(-10i) = 2.9982229502979760 + -1.5707963267948966i
real difference is -6.2172e-15, or ~28eps. while on v8 in linux the real
difference is 'zero', matching your comment #16 result.
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- [Octave-bug-tracker] [bug #49091] MinGW std::acosh less accurate than Linux versions, Markus Mützel, 2022/08/03
- [Octave-bug-tracker] [bug #49091] MinGW std::acosh less accurate than Linux versions, Markus Mützel, 2022/08/03
- [Octave-bug-tracker] [bug #49091] MinGW std::acosh less accurate than Linux versions, Rik, 2022/08/03
- [Octave-bug-tracker] [bug #49091] MinGW std::acosh less accurate than Linux versions,
Nicholas Jankowski <=
- [Octave-bug-tracker] [bug #49091] MinGW std::acosh less accurate than Linux versions, Markus Mützel, 2022/08/03
- [Octave-bug-tracker] [bug #49091] MinGW std::acosh less accurate than Linux versions, Rik, 2022/08/03
- [Octave-bug-tracker] [bug #49091] MinGW std::acosh less accurate than Linux versions, Markus Mützel, 2022/08/04
- [Octave-bug-tracker] [bug #49091] MinGW std::acosh less accurate than Linux versions, John W. Eaton, 2022/08/04
- [Octave-bug-tracker] [bug #49091] MinGW std::acosh less accurate than Linux versions, Nicholas Jankowski, 2022/08/04
- [Octave-bug-tracker] [bug #49091] MinGW std::acosh less accurate than Linux versions, John W. Eaton, 2022/08/04
- [Octave-bug-tracker] [bug #49091] MinGW std::acosh less accurate than Linux versions, Nicholas Jankowski, 2022/08/04
- [Octave-bug-tracker] [bug #49091] MinGW std::acosh less accurate than Linux versions, Rik, 2022/08/04
- [Octave-bug-tracker] [bug #49091] MinGW std::acosh less accurate than Linux versions, Markus Mützel, 2022/08/05
- [Octave-bug-tracker] [bug #49091] MinGW std::acosh less accurate than Linux versions, Markus Mützel, 2022/08/05