Represent Data
Funzioni
timetable | Timetable array with time-stamped rows and variables of different types |
iddata | Input-output data and its properties for system identification in the time or frequency domain |
idfrd | Frequency response data or model |
idinput | Generate input signals to support system identification |
sim | Simulate response of identified model |
size | Query output/input/array dimensions of input–output model and number of frequencies of FRD model |
midprefs | Specify location for file containing System Identification app startup information |
simOptions | Option set for sim |
Blocchi
Iddata Sink | Export simulation data as iddata object to MATLAB workspace |
Iddata Source | Import time-domain data stored in iddata object in
MATLAB workspace |
Esempi e istruzioni
- Import Time-Domain Data into the App
Import time-domain data into the System Identification app
- Import Frequency-Domain Data into the App
Import frequency-domain input-output data and frequency-response data into the System Identification app.
- Import Data Objects into the App
Import
iddata
andidfrd
data objects. - Data Types in System Identification Toolbox
This example describes data types and formats that System Identification Toolbox™ supports.
- Convert SISO Matrix Data to Timetable
Convert matrix-based SISO estimation data to timetables for model identification.
- Convert MIMO Matrix Data to Timetable for Continuous-Time Model Estimation
Estimate a continuous-time MIMO model by first converting matrix-based data to a timetable.
- Generate Data Using Simulation
Creating input data with specific characteristics and simulating the output data from a model.
Concetti
- Representing Data in MATLAB Workspace
Represent time-domain, time-series, and frequency-domain data.
- Requirements on Data Sampling
The toolbox provides limited support for nonuniformly sampled data.
- Specifying the Data Sample Time
Specify time between successive data samples.
- Managing Data in the App
You can get information about each data set in the System Identification app by right-clicking the corresponding data icon.
- Representing Time- and Frequency-Domain Data Using iddata Objects
Using the
iddata
constructor to represent time-domain and frequency-domain data and working withiddata
objects. - Managing iddata Objects
The
iddata
object stores time-domain data or frequency-domain data and has several properties that specify the time or frequency values. - Representing Frequency-Response Data Using idfrd Objects
Using the
idfrd
constructor to represent frequency-response data and working withidfrd
objects. - Manipulating Complex-Valued Data
Supported operations and limitations for handling complex data and commands for manipulating complex signals.