# frest.simView

**Namespace: **frest

Plot frequency response model in time- and frequency-domain

## Syntax

`frest.simView(simout,input,sysest)`

frest.simView(simout,input,sysest,sys)

## Description

`frest.simView(`

opens the Simulation Results Viewer and plots the following frequency response estimation results:`simout`

,`input`

,`sysest`

)

Time-domain simulation

`simout`

of the Simulink modelFFT of time-domain simulation

`simout`

Bode of estimated system

`sysest`

This Bode plot is available when you create the input signal using

`frest.Sinestream`

or`frest.Chirp`

. In this plot, you can interactively select frequencies or a frequency range for viewing the results in all three plots.

You obtain `simout`

and `sysest`

from the
`frestimate`

command using the input signal
`input`

.

`frest.simView(`

includes the linear system `simout`

,`input`

,`sysest`

,`sys`

)`sys`

in the Bode plot when you create the input
signal using `frest.Sinestream`

or `frest.Chirp`

. Use
this syntax to compare the linear system to the frequency response estimation results.

## Examples

## Tips

### Import Variables

After you estimate a new frequency response model, you can import the estimation results into the Simulation Results Viewer.

In the Simulation Results Viewer, select **File** > **Import**.

In the Import Variables dialog box, specify the names of variables available in the
MATLAB^{®} workspace for:

**Simulation output**— This output, obtained from the`frestimate`

command, appears in the time response plot and the FFT.**Simulation input**— Input signal used for estimation.**Estimation result**— This result, obtained from the`frestimate`

command, appears in the Bode plot.**System to compare against (optional)**— Any linear system to appear in the Bode plot with the estimation result.**Tip**You can also import a new linear system to compare the existing estimation results by specifying only the variable for

**System to compare against (optional)**.

## Version History

**Introduced in R2009b**