bugGNU Octave - Bugs: bug #38134, signal package: bug in remez

 
 

bug #38134: signal package: bug in remez

Submitted by:  CarnĂ« Draug <carandraug>
Submitted on:  Mon 21 Jan 2013 03:22:30 PM UTC  
 
Category: Octave Forge PackageSeverity: 3 - Normal
Priority: 5 - NormalItem Group: Incorrect Result
Status: ConfirmedAssigned to: None
Originator Name: Open/Closed: Open
Release: devOperating System: Any

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Fri 21 Jun 2013 03:37:59 AM UTC, comment #1:

Confirmed that the remez() function does give poor results for the given example, although I don't see exactly the same coefficients as reported.

Mike Miller <mtmiller>
Project Member
Mon 21 Jan 2013 03:22:30 PM UTC, original submission:

The following was reported on the mailing list on 15/01/2012 by Anders Brandt. nabble thread.


I am experiencing problems with the remez command in Octave 3.2.4 on Windows. I have tried a number of different orders and griddensities, but all seem to give error. I am trying to define a differentiator.

Example:

MATLAB's firpm, which I understand should give the same (similar) output, gives

The MATLAB result is a really decent differentiator, which cannot be said about the remez output.


Robert T. Short commented:

I don't think this function works. I have not tried it in a long time, but I never got any useful results. I played around with it enough to believe it would not be hard to fix, but it has never bubbled up the priority stack enough to actually do it.

Bob

Carnë Draug <carandraug>
Project Member

 

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  • -unavailable- added by mtmiller (Posted a comment)
  • -unavailable- added by carandraug (Submitted the item)
  • -unavailable- added by carandraug (original bug reporter)
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    Follow 3 latest changes.

    Date Changed By Updated Field Previous Value => Replaced By
    Fri 21 Jun 2013 03:37:59 AM UTCmtmillerStatusNone=>Confirmed
      Operating SystemMicrosoft Windows=>Any
    Mon 21 Jan 2013 03:22:30 PM UTCcarandraugCarbon-Copy-=>Added -unavailable-

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