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[Octave-bug-tracker] [bug #56232] Octave crash when inverting an empty s
From: |
anonyme |
Subject: |
[Octave-bug-tracker] [bug #56232] Octave crash when inverting an empty sparse matrix. |
Date: |
Tue, 7 May 2019 10:28:41 -0400 (EDT) |
User-agent: |
Mozilla/5.0 (Windows NT 6.1; WOW64; rv:60.0) Gecko/20100101 Firefox/60.0 |
Follow-up Comment #20, bug #56232 (project octave):
Here is another interesting data point
>> [L,U,P,Q] = lu(sparse([],[],[],2,2,1))
L =
Compressed Column Sparse (rows = 2, cols = 2, nnz = 2 [50%])
(1, 1) -> 1
(2, 2) -> 1
U =
Compressed Column Sparse (rows = 2, cols = 2, nnz = 0 [0%])
P =
Permutation Matrix
1 0
0 1
Q =
Permutation Matrix
0 1
1 0
I use the value of NZMAX (set to 1) to create a sparse matrix that although it
is empty has valid row, col et data indexes and LU returns a valid
factorization. So again setting the sparse column et data indices to a null
pointer is not the right thing to do.
David
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- [Octave-bug-tracker] [bug #56232] Octave crash when inverting an empty sparse matrix., (continued)
- [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, 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., Marco Caliari, 2019/05/07
- [Octave-bug-tracker] [bug #56232] Octave crash when inverting an empty sparse matrix.,
anonyme <=
- [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
- [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., John W. Eaton, 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