User`s guide

Extracting P ar ameter Values from Linear Models
Commands for Extracting N umerical Model Data (Continued)
Command
Description
Syntax
freqresp
Extracts
frequency-response
data from any
idmodel
or idfrd object.
[H,w,CovH] = freqresp(m)
polydata
Extracts polynomials
from any single-output
idmodel object.
[A,B,C,D,F,dA,dB,dC,dD,dF] = ...
polydata(m)
ssdata
Extracts state-space
matrices from any
idmodel object.
[A,B,C,D,K,X0,...
dA,dB,dC,dD,dK,dX0] = ...
ssdata(Model)
tfdata
Extracts numerator
and denominator
polynomials from any
idmodel object.
[Num,Den,dNum,dDen] = ...
tfdata(Model)
zpkdata
Extracts zeros, poles,
and transfer function
gains from any
idmodel
object.
[Z,P,K,covZ,covP,covK] = ...
zpkdata(m)
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