[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Octave-bug-tracker] [bug #57185] svd returns inconsistent eigenvalues
From: |
Muhali |
Subject: |
[Octave-bug-tracker] [bug #57185] svd returns inconsistent eigenvalues |
Date: |
Thu, 7 Nov 2019 06:19:09 -0500 (EST) |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:70.0) Gecko/20100101 Firefox/70.0 |
URL:
<https://savannah.gnu.org/bugs/?57185>
Summary: svd returns inconsistent eigenvalues
Project: GNU Octave
Submitted by: muhali
Submitted on: Thu 07 Nov 2019 03:19:07 AM PST
Category: None
Severity: 3 - Normal
Priority: 5 - Normal
Item Group: None
Status: None
Assigned to: None
Originator Name:
Originator Email:
Open/Closed: Open
Discussion Lock: Any
Release: 5.1.0
Operating System: GNU/Linux
_______________________________________________________
Details:
x = randn(10, 5) ;
y = randn(10, 5) ;
z = complex(x, y) ;
[~, Dr] = svd(x) ; diag(Dr)
svd(x)
[~, Dc] = svd(z) ; diag(Dc)
svd(z)
isreal(Dr)
isreal(Dc)
This shows that in the complex case, the ordering depends on having explicit
output (Dz) or not. This is inconsistent and also different from Matlab.
svd should also return real and not complex eigenvalues.
_______________________________________________________
Reply to this item at:
<https://savannah.gnu.org/bugs/?57185>
_______________________________________________
Message sent via Savannah
https://savannah.gnu.org/
- [Octave-bug-tracker] [bug #57185] svd returns inconsistent eigenvalues,
Muhali <=
- [Octave-bug-tracker] [bug #57185] svd returns inconsistent eigenvalues, Mike Miller, 2019/11/07
- [Octave-bug-tracker] [bug #57185] svd returns inconsistent eigenvalues, Rik, 2019/11/07
- [Octave-bug-tracker] [bug #57185] svd returns inconsistent eigenvalues, Dmitri A. Sergatskov, 2019/11/07
- [Octave-bug-tracker] [bug #57185] svd returns inconsistent eigenvalues, Kai Torben Ohlhus, 2019/11/07
- [Octave-bug-tracker] [bug #57185] svd returns inconsistent eigenvalues, Muhali, 2019/11/08
- [Octave-bug-tracker] [bug #57185] svds returns inconsistent singular values, Kai Torben Ohlhus, 2019/11/08
- [Octave-bug-tracker] [bug #57185] svds returns inconsistent singular values, Rik, 2019/11/08
- [Octave-bug-tracker] [bug #57185] svds returns inconsistent singular values, Rik, 2019/11/08
- [Octave-bug-tracker] [bug #57185] svds returns inconsistent singular values, Rik, 2019/11/08
- [Octave-bug-tracker] [bug #57185] svds returns inconsistent singular values, Rik, 2019/11/09