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
--
El software de antivirus Avast ha analizado este correo electrónico en busca de
virus.
https://www.avast.com/antivirus
_______________________________________________
users mailing list
[email protected]
http://lists.scilab.org/mailman/listinfo/users
