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[Octave-bug-tracker] [bug #55244] error from mag2db(...) within bode(...
From: |
anonymous |
Subject: |
[Octave-bug-tracker] [bug #55244] error from mag2db(...) within bode(...) when using minreal on the input transfer function |
Date: |
Wed, 19 Dec 2018 10:05:37 -0500 (EST) |
User-agent: |
Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:64.0) Gecko/20100101 Firefox/64.0 |
URL:
<https://savannah.gnu.org/bugs/?55244>
Summary: error from mag2db(...) within bode(...) when using
minreal on the input transfer function
Project: GNU Octave
Submitted by: None
Submitted on: Wed 19 Dec 2018 03:05:36 PM UTC
Category: Octave Function
Severity: 3 - Normal
Priority: 5 - Normal
Item Group: Unexpected Error
Status: None
Assigned to: None
Originator Name:
Originator Email:
Open/Closed: Open
Discussion Lock: Any
Release: 4.0.0
Operating System: GNU/Linux
_______________________________________________________
Details:
I receive an error with the following code and feel it might be a bug.
pkg load control
pkg load signal
Lf = 330e-6;
Cf = 470e-6;
s = tf('s');
Z0min = minreal(s*Cf/(1+s^2*Lf*Cf))
Z0 = s*Cf/(1+s^2*Lf*Cf)
Z0tf = tf([Cf,0],[Lf*Cf,0,1])
The three Z0 transfer functions should be equivalent but when I call
bode(Z0min), I get the following error:
error: Invalid call to mag2db. Correct usage is:
-- Function File: DB = mag2db (MAG)
error: called from
print_usage at line 90 column 5
mag2db at line 44 column 5
The version info is as follows:
GNU Octave Version: 4.0.0
GNU Octave License: GNU General Public License
Operating System: Linux 4.4.0-139-generic #165-Ubuntu SMP Wed Oct 24 10:58:50
UTC 2018 x86_64
----------------------------------------------------------------------
Package Name | Version | Installation directory
--------------+---------+-----------------------
control *| 3.1.0 | /home/octave/control-3.1.0
signal *| 1.4.0 | /home/octave/signal-1.4.0
symbolic | 2.7.1 | /home/octave/symbolic-2.7.1
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- [Octave-bug-tracker] [bug #55244] error from mag2db(...) within bode(...) when using minreal on the input transfer function,
anonymous <=