User`s guide

Identifying Input-Output Polynomial Models
3 To view information about the resulting model object, type the following at
the prompt:
m_armax
MATLAB returns the following information about th is mo del object:
Discrete-time IDPOLY model: A(q)y(t) = B(q)u(t) + e(t)
A(q) = 1 - 1.255q^-1 + 0. 2551q^-2 + 0.2948q^ -3 - 0.0619q^-4
B1(q) = -0.09168 + 1.105q^-1 + 0.7399q^-2
B2(q) = 1.022 + 0.129q^-1
B3(q) = -0.07605 + 0.08681q^-1 + 0.5619q^-2
C(q) = 1-0.06117q^-1 - 0.1461q^-2 + 0.009862q ^-3 - 0.04313q^-4
Estimated using ARMAX from da ta set z8
Loss function 2.23844 and FPE 2.35202
Sampling interv al: 1
m_armax
is an idpoly model object. The coefficients repre sent e stimated
parameters of this polynomial model.
Tip You can use present(m_armax) to show additional information about
the model, including parameter uncertainties.
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