Hello Federico,
simp_mode is a function not a variable,
use :
simp_mode(%f);
Regards,
Antoine
Le 27/08/2020 à 09:50, Federico Miyara a écrit :
> Dear All,
>
> I need to have examples of rationals with very close poles and zeros, but the
> simp engine simplifies them. This is awkward, since the simp documentation
> says there is no threshold, so other than identical poles and zeros shouldn't
> be simplified. Actually this is the case with complicated rationals created
> from electrical network analysis of some filters, but not with the more
> transparent example below.
>
> My second attempt to reproduce the problem in my simple numeric example has
> been to use the command simp_mode to disable any simplification. But it
> doesn't work as expected--and described. For instance, the code
>
> N = poly([1 2 3 3.000009 5], "s")
> D = poly([1.0000001 3.0000003 4 6], "s")
> simp_mode = %f;
> H = N/D
>
> yields these results:
>
> --> N
> N =
> -90.00027 +213.00055s -184.00037s² +74.000099s³ -14.000009s⁴ +s⁵
> --> D
> D =
> 72.000014 -126.00002s +67.000005s² -14s³ +s⁴
> --> H
> H =
>
> -30.000093 +31.000066s -10.00001s² +s³
> --------------------------------------
> 24.000006 -10.000001s +s²
>
> As can be seen, even if I disabled automatic simplification, the result is
> not the raw quotient N/D but a "simplified" version.
>
> Any idea? Is it a bug?
>
> Regards,
>
> Federico Miyara
>
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