[SciPy-User] [signal] zpk -> s domain?

[josef.pktd at gmail.com]

On Fri, Feb 11, 2011 at 9:11 AM, Neal Becker <ndbecker2 at gmail.com> wrote:
> If I have a transfer function in zpk, is there a way to transform to poles and
> zeros in s domain?

I don't know what s domain is.

zpk to transfer function as 2 polynomials
signal.zpk2tf

there are functions to divide 2 polynomials to get one polynomial with
a finite number of terms as approximation to the infinite impulse
response /transfer function.

It's also possible to get the roots of the one polynomial.

there are also functions in scipy.signal to calculate some partial
fraction expansion that I didn't figure out yet.

(Somewhere there is an answer)

Josef


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