# advice

Analysis and recommendations for data or estimated linear models

## Description

`advice(`

displays the following
information about the data in the MATLAB`data`

)^{®} 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

`checkFeedback`

.Would a nonlinear ARX model perform better than a linear ARX model? See also

`isnlarx`

.

`advice(`

displays the
following information about the estimated linear model in the MATLAB Command Window:`model`

,`data`

)

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?

## Examples

## Input Arguments

## Version History

**Introduced before R2006a**

## See Also

`detrend`

| `checkFeedback`

| `pexcit`

| `isnlarx`

| `iddata`