User`s guide

Using Impulse- and Step-Response Plots to Validate Models
The following table summarizes commands that generate impulse- and
step-response plots . For detailed information about each command, see the
corresponding reference page.
Command
Description
Example
impulse
Plots impulse response
for
idpoly, idproc,
idarx, idss,and
idgrey model objects.
Estimates and plots
impulse response
models for
iddata
objects.
Note Does not
support nonlinear
models.
To plot the impulse response
of the model
mod,typethe
followin g command:
impulse(mod)
step
Plots the step response
of all linear and
nonlinear models.
Estimates and plots
step re sponse models
for
iddata objects.
To plot the ste p response
of the model
mod,typethe
followin g command:
step(mod)
To specify step levels for a
nonlinear model, type the
followin g command:
step(mod,
'InputLevel',[u1;u2])
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