User`s guide

Creating Model Structures at the Command Line
Commands for Constructing Model S tructures
The following table summarizes the model constructors available in the
System Identification Toolbox p roduct for representing various types of
models.
After model e stimatio n, you can recognize the corresponding model o bjects
in the MATLAB W orkspace browser by their class names. The name of the
constructor matches the name of the object it creates.
For information about how to both construct and estimate models with a
single command, see “Commands for Model Estimation” on page 2-9.
Summar y of Model Constructors
Model Constructo r Resulting Model Class SingleorMultipleOutputs?
idarx
Parametric multiple-outpu t
ARX models. Also
represents nonparametric
transient-response models.
Single- or m ultiple-output
models.
idfrd
Nonparametric
frequency-response m odel.
Single- or m ultiple-output
models.
idproc
Continuous-time, low-order
transfer functions (process
models).
Single-output models on ly.
idpoly
Linear input-output polynomial
models:
• ARX
• ARMAX
• Output-Error
• Box-Jenkins
Single-output models on ly.
idss
Linear state-space mod els.
Single- or m ultiple-output
models.
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