Re: Octave Control package bug ?

On Thu, Sep 17, 2020 at 7:28 AM Dmitri A. Sergatskov <[email protected]>
wrote:

>
>
> On Thu, Sep 17, 2020 at 2:37 AM Andreas Weber <[email protected]> wrote:
>
>> Am 16.09.20 um 21:03 schrieb Dmitri A. Sergatskov:
>> > ...
>> > I see that there are three different __zero__:
>> > control-3.2.0/@frd/__zero__.m
>> > control-3.2.0/@ss/__zero__.m
>> > control-3.2.0/@tf/__zero__.m
>>
>> Can you share the output from
>> $ find control-3.2.0/ -name "*zero*"
>>
>> on my install:
>>
>> control-3.2.0/@ss/__zero__.m
>> control-3.2.0/@frd/__zero__.m
>> control-3.2.0/@tf/__zero__.m
>> control-3.2.0/@lti/zero.m
>> control-3.2.0/__remove_trailing_zeros__.m
>> control-3.2.0/@tfpoly/__remove_leading_zeros__.m
>> control-3.2.0/@tfpoly/is_zero.m
>> control-3.2.0/tfpolyzeros.m
>>
>> Is it possible that you have another zero function lingering around from
>> an older control version?
>>
>
> find control-3.2.0/ -name "*zero*"
> control-3.2.0/@frd/__zero__.m
> control-3.2.0/__remove_trailing_zeros__.m
> control-3.2.0/@ss/__zero__.m
> control-3.2.0/tfpolyzeros.m
> control-3.2.0/@tf/__zero__.m
> control-3.2.0/@lti/zero.m
> control-3.2.0/@tfpoly/__remove_leading_zeros__.m
> control-3.2.0/@tfpoly/is_zero.m
>
>
>
>>
>> -- Andy
>>
>
> Dmitri.
> --
>

I also added disp("Hi from @tf") to the __zero__.m in @tf/ and disp("Hi
from @ss") to the __zero__.m in @ss/
Now:

octave:5> demo impulse
impulse example 1:
 clf;
 s = tf('s');
 g = 1/(2*s^2+3*s+4);
 impulse(g);
 title ("Impulse response of a PT2 transfer function");

Hi from @tf!
Press <enter> to continue:
impulse example 2:
 clf;
 s = tf('s');
 g = 1/(2*s^2+3*s+4);
 h = c2d(g,0.1);
 impulse(h);
 title ("Impulse response of a discretized PT2 transfer function");

octave:6>

Dmitri.
--