User`s guide

Using Nonlinear ARX Plots to Validate Models

Changing Appearance of the N on linear ARX Plot (Continued)

Action

Command

Hide or show the legend.

Select Style > Legend.Selectthis

option again to show the legend.

(Three axes only)

Rotate in three dimensions.

Note Available only when you

have selected two regressors as

independent variables.

Select Style > 3D Rotate and

drag the axes on the plot to

a new orientation. To disable

three-dimensional rotation, select

Style > 3D Rotate again.

How to Plot Nonlinear ARX Plots at the Command

Line

You can plot the nonlinearity shape of nonlinear ARX models using the

following syntax:

plot(model)

model

must be an idnlarx model objec t. You can use additional plot

argumentstospecifythefollowinginformation:

• Include multiple n onlinear A RX models on the plot.

• Conﬁgure the regressor values for computing the nonlinearity values.

The plot c ommand opens the Nonlin ear ARX Mo del Plot wind o w. For

more information about working w ith this p lot window, see “Conﬁguring

the Nonlinear ARX Plot” on page 8-53 and “Axis Limits, Legend, and 3-D

Rotation” on page 8-54.

For detailed information about

plot, type the following command at the

prompt:

help idnlarx/p lot

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