工作的应用程序,将数据导入系统m Identification app.

SeeRepresent Data.

For working at the command line, create aniddataoridfrdobject.

For time-domain or frequency-domain data, seeRepresenting Time- and Frequency-Domain Data Using iddata Objects.

For frequency-response data, see使用IDFRD对象表示频率响应数据.

To simulate data with and without noise, seeGenerate Data Using Simulation.

Plotting data to examine both time- and frequency-domain behavior.

SeeHow to Plot Data in the AppandHow to Plot Data at the Command Line.

Using theadvicecommand to analyze the data for the presence of constant offsets and trends, delay, possible feedback, and signal excitation levels.

SeeHow to Analyze Data Using the advice Command.

Missing or faulty values (also known asoutliers). For example, you might see gaps that indicate missing data, values that do not fit with the rest of the data, or noninformative values.

SeeHandling Missing Data and Outliers.

Offsets and drifts in signal levels (low-frequency disturbances).

SeeHandling Offsets and Trends in Datafor information about subtracting means and linear trends, andFiltering Datafor information about filtering.

High-frequency disturbances above the frequency interval of interest for the system dynamics.

SeeResampling Datafor information about decimating and interpolating values, andFiltering Datafor information about filtering.