advice

Analysis and recommendations for data or estimated linear models

Syntax

advice(data)
advice(model,data)


Description

advice(data) displays the following information about the data in the MATLAB^® Command Window:

• What are the excitation levels of the signals and how does this affect the model orders? See also pexcit.

• Does it make sense to remove constant offsets and linear trends from the data? See also detrend.

• Is there an indication of output feedback in the data? See also feedback.

• Would a nonlinear ARX model perform better than a linear ARX model?

advice(model,data) displays the following information about the estimated linear model in the MATLAB Command Window:

• Does the model capture essential dynamics of the system and the disturbance characteristics?

• Is the model order higher than necessary?

• Is there potential output feedback in the validation data?

Input Arguments

data	Specify data as an iddata object.
model	Specify model as an idtf, idgrey, idpoly, idproc, or idss model object.