bugGNU Octave - Bugs: bug #51934, [octave forge] (control) impulse...

 
 

bug #51934: [octave forge] (control) impulse response depends on the time vector

Submitter:  Rafael Laboissière <rlaboiss>
Submitted:  Mon 04 Sep 2017 03:01:16 PM UTC
   
 
Category:  Octave Package Severity:  3 - Normal
Priority:  5 - Normal Item Group:  Incorrect Result
Status:  Fixed Assigned to:  None
Originator Name:  Open/Closed:  * Closed
Release:  * other Operating System:  * Any
Fixed Release:  None Planned Release:  None
* Mandatory Fields

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Tue 06 Mar 2018 02:33:14 PM UTC, comment #3: 

Closing, but can you post a link to the changeset that fixed it?

John W. Eaton <jwe>
Group administrator
Tue 06 Mar 2018 02:22:42 PM UTC, comment #2: 

this can be closed as fixed.
The fix is in control-3.1.0

Doug Stewart <dastew>
Mon 04 Sep 2017 03:27:46 PM UTC, comment #1: 

Thanks for testing the control pkg.
I have a fix for this problem.
I intend to spend the next month fixing many problems in the control pkg and then release a new version.
Doug Stewart

Doug Stewart <dastew>
Mon 04 Sep 2017 03:01:16 PM UTC, original submission:  

In version 3.0.0 of the control package, the function impulse is returning different results for different time vectors passed as arguments, but it should not:


octave:1> pkg load control
octave:2> s = tf (1, [1 1]);
octave:3> y = impulse (s, 0 : 0.01 : 1);
octave:4> y (1)
ans =  0.10000
octave:5> y = impulse (s, 0 : 0.1 : 1);
octave:6> y (1)
ans =  1


Notice that the later value is correct, but the former is not.

Rafael Laboissière <rlaboiss>

 

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    Date Changed by Updated Field Previous Value => Replaced by
    2018-03-06 jwe StatusNone Fixed
        Open/ClosedOpen Closed

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