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[Octave-bug-tracker] [bug #36521] buttord() over designs
From: |
Luke |
Subject: |
[Octave-bug-tracker] [bug #36521] buttord() over designs |
Date: |
Tue, 22 May 2012 07:35:36 +0000 |
User-agent: |
Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/536.5 (KHTML, like Gecko) Chrome/19.0.1084.46 Safari/536.5 |
URL:
<http://savannah.gnu.org/bugs/?36521>
Summary: buttord() over designs
Project: GNU Octave
Submitted by: ltclifton
Submitted on: Tue 22 May 2012 07:35:35 AM GMT
Category: None
Severity: 3 - Normal
Priority: 5 - Normal
Item Group: Incorrect Result
Status: None
Assigned to: None
Originator Name:
Originator Email:
Open/Closed: Open
Discussion Lock: Any
Release: 3.6.1
Operating System: Any
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Details:
The buttord() function in the signal processing library over designs band pass
filters. This seems to be a known issue as an error is printed at run-time.
However I could not find a corresponding bug report. I have confirmed that it
does over-design by comparing the output to Matlabs equivalent function.
The following example demonstrates
[n, Wn] = buttord([0.16 0.24], [0.12 0.32], 3, 12)
Octave reports that a 6th order filter is required.
Matlab report (correctly) that a 4th order filter is required.
While Octave's solution satisfies the requirements, it is misleading, and
buggy behavior to report this solution.
_______________________________________________________
Reply to this item at:
<http://savannah.gnu.org/bugs/?36521>
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- [Octave-bug-tracker] [bug #36521] buttord() over designs,
Luke <=