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[Octave-bug-tracker] [bug #55201] Wrong result while dividing matrices
From: |
anonymous |
Subject: |
[Octave-bug-tracker] [bug #55201] Wrong result while dividing matrices |
Date: |
Tue, 11 Dec 2018 04:15:30 -0500 (EST) |
User-agent: |
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.110 Safari/537.36 |
URL:
<https://savannah.gnu.org/bugs/?55201>
Summary: Wrong result while dividing matrices
Project: GNU Octave
Submitted by: None
Submitted on: Tue 11 Dec 2018 09:15:29 AM UTC
Category: None
Severity: 3 - Normal
Priority: 5 - Normal
Item Group: Incorrect Result
Status: None
Assigned to: None
Originator Name: Shotem
Originator Email: address@hidden
Open/Closed: Open
Discussion Lock: Any
Release: 4.4.1
Operating System: Microsoft Windows
_______________________________________________________
Details:
The error occurs in some occasions when trying to divide or multiply times the
inverse of a matrix
For example:
A = [3, -2; 1, 2]
v = [-4, 12]
v/A
Output:
ans =
-2.50000 3.50000
The same happened when I tried to multiply
v*inv(A)
The expected output is:
ans =
2 5
The same problem wasn't found in the following case:
A = [2, 1; 1, 3]
v = [5, 10]
v/A
Output:
ans =
1.00000 3.00000
When the answer matched the expected result.
The answers in both cases were revised using an external tool (Geogebra
Version: 6.0.513.0-offline)
Note:
The notation used does not affect the results as shown in the image.
_______________________________________________________
File Attachments:
-------------------------------------------------------
Date: Tue 11 Dec 2018 09:15:29 AM UTC Name: Captura.PNG Size: 38KiB By:
None
<http://savannah.gnu.org/bugs/download.php?file_id=45624>
_______________________________________________________
Reply to this item at:
<https://savannah.gnu.org/bugs/?55201>
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