Re: [bug #68196] [octave forge] (control) Wrong phase in bode plot

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I have
control *|   4.2.1

and it starts at -90 deg/

What version of control do you have?

On Fri, 12 Jun 2026 at 09:07, Luiz Antonio Maccari Junior <
[email protected]> wrote:

> Follow-up Comment #11, bug #68196 (group octave):
>
> Hi I think this Bug is present yet:
>
> I have the following example:
>
>
>
>
> num = [                0;
>                        0;
>    2.052877715426585e+09;
>    4.416784109977014e+13;
>    1.719831064785571e+17;]'
>
> den = [ 1.000000000000000e+00;
>    8.380906856780281e+04;
>    2.269817212624148e+08;
>    4.344755797517798e+12;
>                        0;]'
>
> TF5 = tf(num,den)
>
> bode(TF5)
>
>
>
> My output is:
>
> (file #)
>
> The expected behavior is the phase range around to -90º. However it starts
> around -360° + 90° =-170
>
>
>
> (file #58709)
>
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