Load Signal Data for Simulation
You can use several different approaches to load data into a model, including:
Root-level input ports — Import signal data from a workspace, using the Input configuration parameter to import it to a root-level input port of a Inport, Enable, or Trigger block. To import many signals to root-level input ports, consider using the Root Inport Mapper tool.
From File block — Read data from a MAT file, outputting the data as a signal.
From Spreadsheet block — Read data from Microsoft® Excel® spreadsheets or CSV spreadsheets, outputting the data as one or more signals.
Playback block — Load data from the workspace, a file, or the Simulation Data Inspector.
Source blocks — Add a source block, such Sine Wave block, to generate signals to input to another block.
Signal Editor block — Display, create, edit, and switch interchangeable scenarios.
Persistent data — Stream big data from a MAT file into a model.
You can create input signal data in a file, workspace variable, or model parameter. You can use data logged in a previous simulation, from another source, or create the data yourself. To determine which signal loading approach to use, see Comparison of Signal Loading Techniques.
Signal Data Loading
|Inport||Create input port for subsystem or external input|
|In Bus Element, Bus Element In||Select input from external port|
|Enable||Add enable port to subsystem or model|
|Trigger||Add trigger or function port to subsystem or model|
|From File||Load data from MAT file into Simulink model|
|From Spreadsheet||Read data from spreadsheet|
|From Workspace||Load signal data from workspace into Simulink model|
|Playback||Load data from workspace, file, or Simulation Data Inspector (Seit R2022b)|
|Signal Editor||Display, create, edit, and switch interchangeable scenarios|
Signal Data Loading
|Generate dataset object for root-level Inport or bus element ports in model|
|Create MATLAB structures that use the same hierarchy and attributes as buses|
|Create structure of |
|Create custom object to map signals to root-level inports|
|Create comma-separated list of variables to map|
|Convert contents of MAT-file to |
|Create custom object to map signals to root-level inports using Simulink mapping mode|
|Start Signal Editor|
|Import signal data and properties from Signal Builder block to Signal Editor block|
|Root Inport Mapper||Import, visualize, and map signal and bus data to root-level inports|
|Input||Option to load external input data for simulation using top-level input ports|
- Provide Signal Data for Simulation
Identify model signal data requirements and load input signal data.
- Overview of Signal Loading Techniques
Understand the techniques available for importing signal data into a model.
- Comparison of Signal Loading Techniques
Determine the signal loading approach that meets your modeling requirements. Often, mapping signal data to root inports works well.
- Control How Models Load Input Data
Control how a simulation loads input data using block parameters, model parameters, and different input data formats.
- Load Signal Data That Uses Units
Load signal data that uses units from data logged in a previous simulation. Signal logging, the To File block, and the To Workspace block can include units information for Dataset or Timeseries logging formats.
- Load Data Logged in Another Simulation
Load signal data into a model that was logged in a previous simulation.
- Load Data to Represent Variable-Step Input from Model Hierarchy
Capture dynamics in external input data for a continuous signal by specifying additional time steps for a variable-step solver.
- Load Input Data for Basic Test Cases
Create input data for a basic test of model behavior.
Load Data to Root-Level Input Ports
- Load Data to Root-Level Input Ports
Load data from a workspace and apply it to a root-level input.
- Load Bus Data to Root-Level Input Ports
Import bus data to top-level input ports by manually specifying the data in the Input configuration parameter or by using the Root Inport Mapper tool.
- Map Data Using Root Inport Mapper Tool
To import, visualize, and map signal and bus data to root inports, use the Root Inport Mapper tool.
- Map Root Inport Signal Data
Open the Root Inport Mapper Tool and select the map mode.
- Create Signal Data for Root Inport Mapping
Create data for root inport mapping using specific guidelines and conventions.
- Map Signal Data to Root Input Ports
Map signal data to root input ports by selecting map modes and options and selecting data. Interpret mapping results.
- Import Signal Data for Root Inport Mapping
Import signal and bus data for root inport mapping. You can also import test vectors from Simulink® Design Verifier™ environment.
- Create and Use Custom Map Modes
Create custom map modes if you do not want to use existing map modes in the Root Inport Mapper tool.
- Root Inport Mapping Scenarios
Work with scenarios in the Root Inport Mapper tool. Create and save scenarios, and load previously saved scenarios.
- Generate MATLAB Scripts for Simulation with Scenarios
After associating a scenario with the model, generate a MATLAB® script to perform batch simulations.
Other Signal Loading Techniques
- Load Input Data for a Bus Using In Bus Element Blocks
Load input data for a bus using In Bus Element blocks.
- Load Data Using the From Workspace Block
Load simulation input data using the From Workspace block.
- Load Data Using the From File Block
Create and save signal data to load from a MAT file using the From File block.
- Load Data Using Playback Block
Load data from the workspace, a file, and the Simulation Data Inspector using the Playback block.
- Load Big Data for Simulations
Load big data as simulation input.
- Stream Data from a MAT-File as Input for a Parallel Simulation
Stream input data for parallel simulations from a MAT-file.
- Load Data with Interchangeable Scenarios
Use Signal Editor block to work with interchangeable scenarios.
- Migrate from Signal Builder Block to Signal Editor Block
Consider replacing Signal Builder blocks with Signal Editor blocks.