Re: [Octave 5.2.0 @ Ubuntu 20.04] Long duration of complex matrix inverse

[Doug Stewart]

On Sun, Mar 29, 2020 at 7:39 AM KamilStawiarski <address@hidden> wrote:

Thanks
It turns out that this problem occures also in manually compiled octave
4.4.1. It means that error comes from one of installed packages.
I'll try install Ubuntu 20.04 in virtualbox and check this at fresh
installation.



--
Sent from: https://octave.1599824.n4.nabble.com/Octave-General-f1599825.html

Ubuntu 18.04 and octave 5.2.0

 tic,inv(randn(6,6)+randn(6,6)*i) ,toc
ans =

 Columns 1 through 3:

  -0.00025458 + 0.00573682i   0.27446154 - 0.36608798i   0.28456015 + 0.00345123i
  -0.02760834 + 0.21434569i  -0.21261140 - 0.08065429i   0.28832795 - 0.23726909i
   0.26573899 - 0.03280374i   0.35208346 - 0.45807078i   0.15867216 - 0.15059749i
  -0.05720839 + 0.02623539i  -0.11396463 + 0.01431508i  -0.09422868 - 0.01999310i
  -0.13747606 + 0.03528087i   0.13991497 + 0.33603846i   0.17490894 - 0.00010424i
   0.05772397 + 0.07352437i   0.43947475 + 0.05767682i  -0.00914495 - 0.19564434i

 Columns 4 through 6:

   0.19321993 - 0.00389561i  -0.22185855 + 0.34759267i  -0.24228221 + 0.32230331i
  -0.02388983 + 0.01740626i  -0.09425709 + 0.06612079i   0.06894793 + 0.18158588i
   0.13899657 + 0.02920899i  -0.08774601 + 0.24028106i  -0.02701063 + 0.27439994i
   0.20429835 - 0.12165223i   0.15918181 - 0.10413616i   0.13709681 - 0.15020959i
   0.07077200 - 0.11193714i  -0.33344663 + 0.01027485i   0.06461853 - 0.26746488i
   0.01255307 + 0.07339730i  -0.26481172 + 0.02987499i  -0.21039622 + 0.11125255i

Elapsed time is 0.00355792 seconds.

--

DAS