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[Octave-bug-tracker] [bug #41795] Unexpected eigenvector matrix from eig
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From: |
Max G. |
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Subject: |
[Octave-bug-tracker] [bug #41795] Unexpected eigenvector matrix from eigs |
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Date: |
Fri, 07 Mar 2014 08:57:03 +0000 |
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User-agent: |
Mozilla/5.0 (X11; Linux i686) AppleWebKit/537.36 (KHTML, like Gecko) Ubuntu Chromium/32.0.1700.107 Chrome/32.0.1700.107 Safari/537.36 |
Follow-up Comment #1, bug #41795 (project octave):
I tried to reproduce the error, but I couldn't.
octave -q
octave:1> X = rand(10, 8);
octave:2> Z = X*X';
octave:3> r = rank(Z) % should return 8
r = 8
octave:4> [V, D] = eigs(Z, r, "lm");
octave:5> whos
Variables in the current scope:
Attr Name Size Bytes Class
==== ==== ==== ===== =====
D 8x8 64 double
V 8x10 640 double
X 10x8 640 double
Z 10x10 800 double
r 1x1 8 double
Total is 325 elements using 2152 bytes
Furthermore,
[V, D] = eigs(Z, 9, "lm"); works too.
I'm using Xubuntu 13.10 and self-compiled Octave 3.8.0.
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