bugGNU Octave - Bugs: bug #38297, signal package: bilinear not...


bug #38297: signal package: bilinear not compatible with Matlab

Submitted by:  sarbjit <sarbjit>
Submitted on:  Sun Feb 10 04:36:41 2013  
Category: Octave Forge PackageSeverity: 1 - Wish
Priority: 5 - NormalItem Group: Matlab Compatibility
Status: ConfirmedAssigned to: Mike Miller <mtmiller>
Originator Name: sarbjitOpen/Closed: Open
Release: otherOperating System: Any

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Thu Dec 8 04:55:40 2016, 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 Feb 10 04:36:41 2013, original submission:


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:-

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 :


sarbjit <sarbjit>


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  • -unavailable- added by nrjank (Posted a comment)
  • -unavailable- added by mtmiller (Updated the item)
  • -unavailable- added by sarbjit (Submitted the item)

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    Follow 8 latest changes.

    Date Changed By Updated Field Previous Value => Replaced By
    Thu Jun 4 02:05:52 2015mtmillerSeverity3 - Normal=>1 - Wish
      Assigned toNone=>mtmiller
    Fri Jun 21 03:22:41 2013mtmillerStatusNone=>Confirmed
      Summarysignal package: bilinear function in Octave is not compatible with Matlab =>signal package: bilinear not compatible with Matlab
    Sun Feb 10 17:08:42 2013mtmillerCategoryNone=>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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