[Octave-bug-tracker] [bug #53205] buttord function MATLAB compatibility issue

[Botond Sandor Kirei]

URL:
  <http://savannah.gnu.org/bugs/?53205>

                 Summary: buttord function MATLAB compatibility issue
                 Project: GNU Octave
            Submitted by: botondkirei
            Submitted on: Thu 22 Feb 2018 01:17:16 PM UTC
                Category: Octave Function
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Matlab Compatibility
                  Status: None
             Assigned to: None
         Originator Name: 
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
                 Release: 4.2.1
        Operating System: Any

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Details:

The MATALB function "buttord" is suitable to obtain the order of an analogic
filter too. The common use for analog filter design is "buttord(...,'s')" - 
the 's' flag is appended in the argument list.

The current versions of Siganl package of OCTAVE is not compliant with the
MATLAB function.

Proposed solution:

I am not sure how to contribute to octave's signal package codebase, thus I
created a development branch:
https://sourceforge.net/u/botondkirei/octave/ci/default/tree/

The proposed implementation is in the branches buttord.m function.





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