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[Octave-bug-tracker] [bug #55564] GESDD: vastly different singular value
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[Octave-bug-tracker] [bug #55564] GESDD: vastly different singular values when vectors are also requested |
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Fri, 15 Feb 2019 07:50:03 -0500 (EST) |
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Follow-up Comment #17, bug #55564 (project octave):
I forgot to mention that I vote for keep using the 'gesdd' driver.
There is one more SVD solver in LAPACK: 'dgejsv', which uses Jacobi SVD
algorithm. It should be the most accurate one in LAPACK. If possible, I wish
to add that as an addition svd_driver. Should I open another ticket/issue for
this?
Fix for some typos in comment #16 ...
"demo 'gesdd' is better than 'gesvd'"
it is a demo of 'gesvd' is better than 'gesdd':
In the attachement (file #46268), The comment
% Characteristic polynomial of A*A', note svd(A)=eig(A*A')=roots(c).
should be
% Characteristic polynomial of I-A*A', note svd(A)^2=eig(A*A')=1-roots(c).
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- [Octave-bug-tracker] [bug #55564] GESDD: vastly different singular values when vectors are also requested, count, 2019/02/14
- [Octave-bug-tracker] [bug #55564] GESDD: vastly different singular values when vectors are also requested, Tim Mitchell, 2019/02/15
- [Octave-bug-tracker] [bug #55564] GESDD: vastly different singular values when vectors are also requested,
count <=
- [Octave-bug-tracker] [bug #55564] GESDD: vastly different singular values when vectors are also requested, count, 2019/02/15
- [Octave-bug-tracker] [bug #55564] GESDD: vastly different singular values when vectors are also requested, Tim Mitchell, 2019/02/15
- [Octave-bug-tracker] [bug #55564] GESDD: vastly different singular values when vectors are also requested, Rik, 2019/02/15
- [Octave-bug-tracker] [bug #55564] GESDD: vastly different singular values when vectors are also requested, count, 2019/02/15
- [Octave-bug-tracker] [bug #55564] GESDD: vastly different singular values when vectors are also requested, Eddy, 2019/02/24
- [Octave-bug-tracker] [bug #55564] GESDD: vastly different singular values when vectors are also requested, Mike Miller, 2019/02/25