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Analysis and recommendations for data or estimated linear models




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


Specify data as an iddata object.


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

See Also

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Introduced before R2006a

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