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[Octave-bug-tracker] [bug #55564] GESDD: vastly different singular value
From: |
Rik |
Subject: |
[Octave-bug-tracker] [bug #55564] GESDD: vastly different singular values when vectors are also requested |
Date: |
Thu, 24 Jan 2019 20:06:22 -0500 (EST) |
User-agent: |
Mozilla/5.0 (Windows NT 10.0; WOW64; Trident/7.0; rv:11.0) like Gecko |
Follow-up Comment #4, bug #55564 (project octave):
@Mike: Thanks. I renamed the function to tst_svd on my platform. Here is a
sample session which shows changing the backend SVD function to GESVD fixes
the issue.
octave:6> svd_driver ('gesdd')
octave:7> tst_svd (25)
octave:8> tst_svd (26)
error: called from
assert at line 424 column 7
tst_svd at line 6 column 3
error: ASSERT errors for: assert (s1,s2,-10 * eps)
Location | Observed | Expected | Reason
(2) 6532088430.599 60796517600.6995 Rel err 0.89256 exceeds tol
2.2204e-15 by 0.9
(3) 1 60796517600.6995 Rel err 1 exceeds tol 2.2204e-15
by 1
(4) 1 60796517600.6995 Rel err 1 exceeds tol 2.2204e-15
by 1
(5) 1 60796517600.6995 Rel err 1 exceeds tol 2.2204e-15
by 1
(6) 1 60796517600.6995 Rel err 1 exceeds tol 2.2204e-15
by 1
(7) 1 60796517600.6995 Rel err 1 exceeds tol 2.2204e-15
by 1
(8) 1 60796517600.6995 Rel err 1 exceeds tol 2.2204e-15
by 1
(9) 1 60796517600.6995 Rel err 1 exceeds tol 2.2204e-15
by 1
(10) 1 60796517600.6995 Rel err 1 exceeds tol 2.2204e-15
by 1
(11) 1 60796517600.6995 Rel err 1 exceeds tol 2.2204e-15
by 1
(12) 1 60796517600.6995 Rel err 1 exceeds tol 2.2204e-15
by 1
(13) 1 60796517600.6995 Rel err 1 exceeds tol 2.2204e-15
by 1
(14) 1 60796517600.6995 Rel err 1 exceeds tol 2.2204e-15
by 1
(15) 1 60796517600.6995 Rel err 1 exceeds tol 2.2204e-15
by 1
(16) 1 60796517600.6995 Rel err 1 exceeds tol 2.2204e-15
by 1
(17) 1 60796517600.6995 Rel err 1 exceeds tol 2.2204e-15
by 1
(18) 1 60796517600.6995 Rel err 1 exceeds tol 2.2204e-15
by 1
(19) 1 60796517600.6995 Rel err 1 exceeds tol 2.2204e-15
by 1
(20) 1 60796517600.6995 Rel err 1 exceeds tol 2.2204e-15
by 1
(21) 1 60796517600.6995 Rel err 1 exceeds tol 2.2204e-15
by 1
(22) 1 60796517600.6995 Rel err 1 exceeds tol 2.2204e-15
by 1
(23) 1 60796517600.6995 Rel err 1 exceeds tol 2.2204e-15
by 1
(24) 1 60796517600.6995 Rel err 1 exceeds tol 2.2204e-15
by 1
(25) 0.66234006257608 60796517600.6995 Rel err 1 exceeds tol
2.2204e-15 by 1
(26) 1.5308724083297e-10 2336599984.2757 Rel err 1 exceeds tol
2.2204e-15 by 1
octave:8> svd_driver ('gesvd')
octave:9> tst_svd (25)
octave:10> tst_svd (26)
octave:11> diary off
_______________________________________________________
Reply to this item at:
<https://savannah.gnu.org/bugs/?55564>
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- [Octave-bug-tracker] [bug #55564] GESDD: vastly different singular values when vectors are also requested, anonymous, 2019/01/24
- [Octave-bug-tracker] [bug #55564] GESDD: vastly different singular values when vectors are also requested, Rik, 2019/01/24
- [Octave-bug-tracker] [bug #55564] GESDD: vastly different singular values when vectors are also requested, Mike Miller, 2019/01/24
- [Octave-bug-tracker] [bug #55564] GESDD: vastly different singular values when vectors are also requested, Mike Miller, 2019/01/24
- [Octave-bug-tracker] [bug #55564] GESDD: vastly different singular values when vectors are also requested,
Rik <=
- [Octave-bug-tracker] [bug #55564] GESDD: vastly different singular values when vectors are also requested, Rik, 2019/01/24
- [Octave-bug-tracker] [bug #55564] GESDD: vastly different singular values when vectors are also requested, Mike Miller, 2019/01/24
- [Octave-bug-tracker] [bug #55564] GESDD: vastly different singular values when vectors are also requested, Dmitri A. Sergatskov, 2019/01/24
- [Octave-bug-tracker] [bug #55564] GESDD: vastly different singular values when vectors are also requested, Rik, 2019/01/25
- [Octave-bug-tracker] [bug #55564] GESDD: vastly different singular values when vectors are also requested, Dmitri A. Sergatskov, 2019/01/25
- [Octave-bug-tracker] [bug #55564] GESDD: vastly different singular values when vectors are also requested, Mike Miller, 2019/01/25
- [Octave-bug-tracker] [bug #55564] GESDD: vastly different singular values when vectors are also requested, Rik, 2019/01/25
- [Octave-bug-tracker] [bug #55564] GESDD: vastly different singular values when vectors are also requested, Tim Mitchell, 2019/01/25
- [Octave-bug-tracker] [bug #55564] GESDD: vastly different singular values when vectors are also requested, Rik, 2019/01/25
- [Octave-bug-tracker] [bug #55564] GESDD: vastly different singular values when vectors are also requested, Rik, 2019/01/25