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[Octave-bug-tracker] [bug #45834] [T, wr]=grpdelay(b, a, w) does not use
From: |
anonymous |
Subject: |
[Octave-bug-tracker] [bug #45834] [T, wr]=grpdelay(b, a, w) does not use or return w |
Date: |
Thu, 27 Aug 2015 12:21:50 +0000 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/44.0.2403.157 Safari/537.36 |
URL:
<http://savannah.gnu.org/bugs/?45834>
Summary: [T,wr]=grpdelay(b,a,w) does not use or return w
Project: GNU Octave
Submitted by: None
Submitted on: Thu 27 Aug 2015 12:21:49 UTC
Category: Octave Forge Package
Severity: 3 - Normal
Priority: 5 - Normal
Item Group: Incorrect Result
Status: None
Assigned to: None
Originator Name: Robert Jenssen
Originator Email: address@hidden
Open/Closed: Open
Discussion Lock: Any
Release: 4.0.0
Operating System: GNU/Linux
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Details:
I am using signal-1.3.2. The Octave code
pkg load signal
[b,a]=butter(5,0.3);
[H,w]=freqz(b,a,256);
[Hp,wp]=freqz(b,a,w(1:128));
behaves as expected from the help description. wp=w(1:128).
The Octave code
pkg load signal
[b,a]=butter(5,0.3);
[T,w]=grpdelay(b,a,256);
[Tp,wp]=grpdelay(b,a,w(1:128));
does not behave as expected. Tp is calculated over 128 points across [0,pi]
(where pi corresponds to Fs/2). I expected 128 points across [0,pi/2]. In
addition, wp is scaled strangely.
_______________________________________________________
Reply to this item at:
<http://savannah.gnu.org/bugs/?45834>
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- [Octave-bug-tracker] [bug #45834] [T, wr]=grpdelay(b, a, w) does not use or return w,
anonymous <=