bugGNU Octave - Bugs: bug #38297, [octave forge] (signal) bilinear...

 
 

bug #38297: [octave forge] (signal) bilinear not compatible with Matlab

Submitted by:  sarbjit <sarbjit>
Submitted on:  Sun 10 Feb 2013 04:36:41 AM UTC  
 
Category:  Octave Forge Package Severity:  1 - Wish
Priority:  1 - Later Item Group:  Matlab Compatibility
Status:  Postponed Assigned to:  Mike Miller <mtmiller>
Originator Name:  sarbjit Open/Closed:  Open
Release:  other Operating System:  Any

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Thu 08 Dec 2016 04:55:40 AM UTC, comment #1:

This issue appears to have been resolved since the original post, as signal package 1.3.2 shows the same input form as matlab in the help for bilinear:

it does however mention that:

not sure what it means exactly, but the output may still be matlab incompatible.

Nicholas Jankowski <nrjank>
Sun 10 Feb 2013 04:36:41 AM UTC, original submission:

Hi,

bilinear function which is used for conversion of analog to digital filters is not compatible with Matlab. Matlab version of this function provides support to take "pre-warping" frequency as an argument.

Matlab Syntax:-
[zd,pd,kd]=bilinear(z,p,k,fs)
[zd,pd,kd]=bilinear(z,p,k,fs,fp)
[numd,dend]=bilinear(num,den,fs)
[numd,dend]=bilinear(num,den,fs,fp)
[Ad,Bd,Cd,Dd]=bilinear(A,B,C,D,fs)
[Ad,Bd,Cd,Dd]=bilinear(A,B,C,D,fs,fp)

While the bilinear available in Octave has the following syntax:

usage: [Zz, Zp, Zg] = bilinear(Sz, Sp, Sg, T)
[Zb, Za] = bilinear(Sb, Sa, T)

For more details refer :
http://www.mathworks.in/help/signal/ref/bilinear.html

-Sarbjit

sarbjit <sarbjit>

 

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  • -email is unavailable- added by jwe (Updated the item)
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    Follow 11 latest changes.

    Date Changed by Updated Field Previous Value => Replaced by
    2018-04-03 mtmiller Priority5 - Normal => 1 - Later
        StatusConfirmed => Postponed
    2017-08-13 jwe Summarysignal package: bilinear not compatible with Matlab => [octave forge] (signal) bilinear not compatible with Matlab
    2015-06-04 mtmiller Severity3 - Normal => 1 - Wish
        Assigned toNone => mtmiller
        Release3.6.2 => other
    2013-06-21 mtmiller StatusNone => Confirmed
        Summarysignal package: bilinear function in Octave is not compatible with Matlab => signal package: bilinear not compatible with Matlab
    2013-02-10 mtmiller CategoryNone => Octave Forge Package
        Operating SystemMicrosoft Windows => Any
        Summarybilinear function in Octave is not compatible with Matlab => signal package: bilinear function in Octave is not compatible with Matlab

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