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[Octave-bug-tracker] [bug #56232] Octave crash when inverting an empty s
From: |
Marco Caliari |
Subject: |
[Octave-bug-tracker] [bug #56232] Octave crash when inverting an empty sparse matrix. |
Date: |
Tue, 7 May 2019 05:59:00 -0400 (EDT) |
User-agent: |
Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:66.0) Gecko/20100101 Firefox/66.0 |
Follow-up Comment #16, bug #56232 (project octave):
@Rik: your patch fixes the problem with inv, but I think that the source of
the problem is the LU factorization of a sparse null matrix. The result should
be
>> [L, U, P, Q] = umfpack (sparse (2, 2, 0))
L =
(1,1) 1
(2,2) 1
U =
All zero sparse: 2×2
P =
(1,1) 1
(2,2) 1
Q =
(2,1) 1
(1,2) 1
Here umfpack () is the mex interface of UMFPACK, run in matlab. So, it seems
that UMFPACK is able to compute the factorization of a sparse null matrix, but
not in octave. I fear that your patch may hide the true source of troubles.
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- [Octave-bug-tracker] [bug #56232] Octave crash when inverting an empty sparse matrix., Marco Caliari, 2019/05/01
- [Octave-bug-tracker] [bug #56232] Octave crash when inverting an empty sparse matrix., anonyme, 2019/05/06
- [Octave-bug-tracker] [bug #56232] Octave crash when inverting an empty sparse matrix., Marco Caliari, 2019/05/06
- [Octave-bug-tracker] [bug #56232] Octave crash when inverting an empty sparse matrix., Rik, 2019/05/06
- [Octave-bug-tracker] [bug #56232] Octave crash when inverting an empty sparse matrix., Marco Caliari, 2019/05/06
- [Octave-bug-tracker] [bug #56232] Octave crash when inverting an empty sparse matrix., Rik, 2019/05/06
- [Octave-bug-tracker] [bug #56232] Octave crash when inverting an empty sparse matrix., Rik, 2019/05/06
- [Octave-bug-tracker] [bug #56232] Octave crash when inverting an empty sparse matrix., Rik, 2019/05/06
- [Octave-bug-tracker] [bug #56232] Octave crash when inverting an empty sparse matrix., Rik, 2019/05/06
- [Octave-bug-tracker] [bug #56232] Octave crash when inverting an empty sparse matrix.,
Marco Caliari <=
- [Octave-bug-tracker] [bug #56232] Octave crash when inverting an empty sparse matrix., anonyme, 2019/05/07
- [Octave-bug-tracker] [bug #56232] Octave crash when inverting an empty sparse matrix., anonyme, 2019/05/07
- [Octave-bug-tracker] [bug #56232] Octave crash when inverting an empty sparse matrix., Marco Caliari, 2019/05/07
- [Octave-bug-tracker] [bug #56232] Octave crash when inverting an empty sparse matrix., anonyme, 2019/05/07
- [Octave-bug-tracker] [bug #56232] Octave crash when inverting an empty sparse matrix., anonyme, 2019/05/07
- [Octave-bug-tracker] [bug #56232] Octave crash when inverting an empty sparse matrix., anonyme, 2019/05/07
- [Octave-bug-tracker] [bug #56232] Octave crash when inverting an empty sparse matrix., Rik, 2019/05/07
- [Octave-bug-tracker] [bug #56232] Octave crash when inverting an empty sparse matrix., Rik, 2019/05/07
- [Octave-bug-tracker] [bug #56232] Octave crash when inverting an empty sparse matrix., Rik, 2019/05/07
- [Octave-bug-tracker] [bug #56232] Octave crash when inverting an empty sparse matrix., Marco Caliari, 2019/05/07