[Top][All Lists]
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Octave-bug-tracker] [bug #36437] chol2inv can't handle sparse matrix
From: |
Nir Krakauer |
Subject: |
[Octave-bug-tracker] [bug #36437] chol2inv can't handle sparse matrix |
Date: |
Wed, 09 May 2012 01:02:16 +0000 |
User-agent: |
Mozilla/5.0 (X11; U; Linux x86_64; en-US) AppleWebKit/534.3 (KHTML, like Gecko) Chrome/6.0.472.63 Safari/534.3 |
URL:
<http://savannah.gnu.org/bugs/?36437>
Summary: chol2inv can't handle sparse matrix
Project: GNU Octave
Submitted by: nir_krakauer
Submitted on: Wed 09 May 2012 01:02:15 AM GMT
Category: None
Severity: 3 - Normal
Priority: 5 - Normal
Item Group: None
Status: None
Assigned to: None
Originator Name: Nir Krakauer
Originator Email:
Open/Closed: Open
Discussion Lock: Any
Release: 3.6.1
Operating System: GNU/Linux
_______________________________________________________
Details:
chol2inv seems not to work when the input is a sparse upper triangular matrix.
For example:
n = 10;
X = spdiags(ones(n, 1) * [1 2 1], [-1 0 1], n, n);
Y = chol(X);
Z = chol2inv(Y)
error: chol2inv: spchol2inv requires triangular matrix
On the other hand,
Z = chol2inv(full(Y))
returns the expected result
_______________________________________________________
Reply to this item at:
<http://savannah.gnu.org/bugs/?36437>
_______________________________________________
Message sent via/by Savannah
http://savannah.gnu.org/
[Prev in Thread] |
Current Thread |
[Next in Thread] |
- [Octave-bug-tracker] [bug #36437] chol2inv can't handle sparse matrix,
Nir Krakauer <=