How to replace the variable s with the complex variable jw?

mir
2023 8 24
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更新时间：2023 8 31
3 次查看（30 天）

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Hi everyone,
i'll explain my problem.
I have a polynomial P(s) and I would like to replace s with the complex variable jw in such a way as to solve the polynomial P(jw)=0 in the variable w.
possible solutions?

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Dyuman Joshi
Dyuman Joshi 2023-8-24
移动：Dyuman Joshi 2023-8-30
Assuming you are working with symbolic variables, use symbolic substitution - subs
mir
mir 2023-8-25
移动：Dyuman Joshi 2023-8-30
yes, but if i use subs to replace jw to s i can't solve the polynomial in the variable w.
Dyuman Joshi
Dyuman Joshi 2023-8-25
移动：Dyuman Joshi 2023-8-30
Ran in:
Ran in:
"... can't solve the polynomial in the variable w."
What makes you think so?
syms x y z
z = x^2-3*x+2
z = 
z = subs(z,x,y)
z = 
out = solve(z)
out = 
@mir It would be better if you attach/copy-paste your code here and specify what is it that you are trying to do.

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mir
mir
2023-8-24

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mir
mir
2023-8-31

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