bugGNU Octave - Bugs: bug #60427, [octave forge] (signal) decimate...


bug #60427: [octave forge] (signal) decimate function outputs divergent numbers

Submitter:  Paul Netsaver <netsaver>
Submitted:  Tue 20 Apr 2021 09:26:02 PM UTC
Category:  Octave Forge Package Severity:  3 - Normal
Priority:  5 - Normal Item Group:  Inaccurate Result
Status:  Confirmed Assigned to:  None
Originator Name:  Netsaver Paul Open/Closed:  * Open
Release:  * dev Operating System:  * Any
Fixed Release:  None Planned Release:  None
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Wed 21 Apr 2021 06:02:17 PM UTC, comment #1: 


To me, this looks like a small missing feature of the Octave decimate function. According to https://www.mathworks.com/help/signal/ref/decimate.html, the Chebyshev filter order needs to be automatically reduced when the distortion is too large.

Mike Miller <mtmiller>
Group administrator
Tue 20 Apr 2021 09:26:02 PM UTC, original submission:  


ans [Matlab 2016a]=

ans [Octave 6.2]=

Does not happen with ratio = 1e2, but maybe the use case is not so significant...
Paul Netsaver

Paul Netsaver <netsaver>


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    Follow 6 latest changes.

    Date Changed by Updated Field Previous Value => Replaced by
    2021-04-21 mtmiller Summary[octave forge] (signal): decimate function outputs divergent numbers [octave forge] (signal) decimate function outputs divergent numbers
    2021-04-21 mtmiller Item GroupIncorrect Result Inaccurate Result
        Release6.2.0 dev
    2021-04-20 pantxo StatusNone Confirmed
        Operating SystemMicrosoft Windows Any
        Summarydecimate function outputs divergent numbers [octave forge] (signal): decimate function outputs divergent numbers

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