User`s guide

8 Model Analysis
Frequency Function Plot Settings (Continued)
Action
Command
Change amplitude scale
between linear and
logarithmic.
Select Style > Linear amplitude scale or
Style > Log amplitude scale.
(Multiple-output system
only)
Select an input-output pair
to view the noise spectrum
corresponding to those
channels.
Note You cannot view
cross spectra betwe en
different outputs.
SelecttheoutputbynameintheChannel
menu.
HowtoPlotBodeandNyquistPlotsattheCommand
Line
You can plot Bode and Nyquist plots for linear models using the bo de, ffplot,
and
nyquist commands.
All plot commands have the same basic syntax, as follows:
• To plot one model, use the syntax
command(model).
• To plot several models, use the syntax
command(model1,model2,...,modelN).
In this case,
command represents any of the plotting commands.
To display confidence inter va ls for a sp ecified number of standard deviations,
use the following syntax:
command(model, 'sd' ,sd)
8-38