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[Octave-bug-tracker] [bug #59488] eigs error in dsaupd for zero matrix
From: |
John W. Eaton |
Subject: |
[Octave-bug-tracker] [bug #59488] eigs error in dsaupd for zero matrix |
Date: |
Fri, 20 Nov 2020 11:51:41 -0500 (EST) |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Firefox/78.0 |
Follow-up Comment #11, bug #59488 (project octave):
With 4.2.2:
octave:1> opts.v0 = [1;0;1];
octave:2> eigs (zeros(3), 1, 'lm', opts)
ans = 0
With 4.4.1:
octave:1> opts.v0 = [1;0;1];
octave:2> eigs (zeros(3), 1, 'lm', opts)
error: __eigs__: eigs: error -9 in dsaupd
error: called from
eigs at line 285 column 18
With 5.2.0:
octave:1> opts.v0 = [1;0;1];
octave:2> eigs (zeros(3), 1, 'lm', opts)
error: __eigs__: eigs: error in dsaupd: Starting vector is zero
This should not happen. Please, see
https://www.gnu.org/software/octave/bugs.html, and file a bug report
error: called from
eigs at line 285 column 20
All on the same system with the same version of ARPACK installed from the
Debian package:
devnull:810> dpkg -l '*arpack*'
Desired=Unknown/Install/Remove/Purge/Hold
|
Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name Version Architecture Description
+++-====================-============-============-============================================================================
ii libarpack2:amd64 3.7.0-3 amd64 Fortran77 subroutines to
solve large scale eigenvalue problems
ii libarpack2-dev:amd64 3.7.0-3 amd64 Fortran77 subroutines to
solve large scale eigenvalue problems (development)
Also, for the one that succeeds, eig is called instead of __eigs__, so ARPACK
isn't even used in that case.
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- [Octave-bug-tracker] [bug #59488] eigs error in dsaupd for zero matrix, (continued)
- [Octave-bug-tracker] [bug #59488] eigs error in dsaupd for zero matrix, Rik, 2020/11/19
- [Octave-bug-tracker] [bug #59488] eigs error in dsaupd for zero matrix, JD, 2020/11/20
- [Octave-bug-tracker] [bug #59488] eigs error in dsaupd for zero matrix, Philip Nienhuis, 2020/11/20
- [Octave-bug-tracker] [bug #59488] eigs error in dsaupd for zero matrix, Markus Mützel, 2020/11/20
- [Octave-bug-tracker] [bug #59488] eigs error in dsaupd for zero matrix, JD, 2020/11/20
- [Octave-bug-tracker] [bug #59488] eigs error in dsaupd for zero matrix, John W. Eaton, 2020/11/20
- [Octave-bug-tracker] [bug #59488] eigs error in dsaupd for zero matrix, John W. Eaton, 2020/11/20
- [Octave-bug-tracker] [bug #59488] eigs error in dsaupd for zero matrix, Rik, 2020/11/20
- [Octave-bug-tracker] [bug #59488] eigs error in dsaupd for zero matrix, Rik, 2020/11/20
- [Octave-bug-tracker] [bug #59488] eigs error in dsaupd for zero matrix, JD, 2020/11/20
- [Octave-bug-tracker] [bug #59488] eigs error in dsaupd for zero matrix,
John W. Eaton <=
- [Octave-bug-tracker] [bug #59488] eigs error in dsaupd for zero matrix, Rik, 2020/11/20
- [Octave-bug-tracker] [bug #59488] eigs error in dsaupd for zero matrix, JD, 2020/11/25
- [Octave-bug-tracker] [bug #59488] eigs error in dsaupd for zero matrix, Rik, 2020/11/25
- [Octave-bug-tracker] [bug #59488] eigs error in dsaupd for zero matrix, Rik, 2020/11/25
- [Octave-bug-tracker] [bug #59488] eigs error in dsaupd for zero matrix, Rik, 2020/11/25
- [Octave-bug-tracker] [bug #59488] eigs error in dsaupd for zero matrix, Kai Torben Ohlhus, 2020/11/26