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Manage Design Data

Assign variable values using model workspace, symbols, data objects, and data classes

You can use MATLAB® variables to configure and manage signals and block parameters in a model. For more information about how models use variables, see Symbol Resolution. To create, edit, and manage variables, see Create, Edit, and Manage Workspace Variables.

You can store model variables in the MATLAB base workspace, a model workspace, or a data dictionary. To decide where to store variables for your model, see Determine Where to Store Variables and Objects for Simulink Models.

To use variables to control signal and parameter characteristics, such as data types and code generation settings, you can store data objects in a workspace or data dictionary. See Data Objects.


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Simulink.findVarsAnalyze relationship between variables and blocks in models workspace variables to MATLAB script MATLAB expression in context of Simulink model variable values in context of Simulink model existence of variable in context of Simulink model new data dictionary and create object data dictionary for editing file names and paths of open data dictionaries
Simulink.dictionary.archdata.createCreate Simulink data dictionary and Architectural Data object (Since R2023b)
Simulink.dictionary.archdata.openCreate Architectural Data object representing architectural data of existing Simulink data dictionary (Since R2023b)
Simulink.LibraryDictionary.clearClear library dictionary dependency analysis (Since R2021a)
Simulink.LibraryDictionary.refreshUpdate library dictionary dependencies (Since R2021a)
Simulink.LibraryDictionary.resetLibraryLinksClear cached information on library dictionary links (Since R2022a) registered file adapters (Since R2022b) custom file adapter (Since R2022b) custom file adapter (Since R2022b)


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Simulink.ModelWorkspaceInteract with the model workspace of a model programmatically
Simulink.WorkspaceVarStore information about workspace variables and blocks that use them
Simulink.VariableUsageStore information about the relationship between variables and blocks in models
Simulink.CoderInfoSpecify information needed to generate code for signal, state, or parameter data data dictionary data dictionary section data dictionary entry enumerated type definition in data dictionary
Simulink.dictionary.ArchitecturalDataEdit architectural data in a Simulink data dictionary programmatically (Since R2023b)
Simulink.dictionary.archdata.DataInterfaceEdit data interface in Simulink data dictionary programmatically (Since R2023b)
Simulink.dictionary.archdata.DataElementData element of data interface (Since R2023b)
Simulink.dictionary.archdata.PhysicalInterfacePhysical interface (Since R2023b)
Simulink.dictionary.archdata.PhysicalElementPhysical element of a physical interface (Since R2023b)
Simulink.dictionary.archdata.FunctionElementFunction in client-server interface (Since R2023b)
Simulink.dictionary.archdata.FunctionArgumentFunction argument in function element of client-server interface (Since R2023b)
Simulink.dictionary.archdata.ServiceInterfaceService interface (Since R2023b)
Simulink.dictionary.archdata.StructTypeStructure data type (Since R2023b)
Simulink.dictionary.archdata.StructElementStruct element of a struct type (Since R2023b) class used to define file adapter for reading custom file formats (Since R2022b) data for external data source (Since R2022b) custom external file adapter (Since R2022b)


Data Storage for Simulink Models

Data Storage in Model Workspace

  • Model Workspaces
    Place variables and objects that a model uses in a workspace that only the model can access.
  • Change Model Workspace Data
    When you store data in a model workspace, you choose a data source, such as the model file or an external MAT-file. To modify the variables at the source, you use a different procedure depending on the type of source that you selected.
  • Specify Source for Data in Model Workspace
    Store variables and objects that a model uses in the model file or in a separate file. Optionally, store the variables and objects as code that you can modify.

Data Storage in Dictionary

Data Storage in Objects and Variables

  • Create, Edit, and Manage Workspace Variables
    Workspace variables enable you to share information, such as parameter values and data types, between blocks and models. Use different tools and techniques to create and manipulate workspace variables.
  • Edit and Manage Workspace Variables by Using Model Explorer
    Find out which workspace variables are used by a model or block, find blocks that use a variable, find unused variables, and rename a variable everywhere it is used by blocks. Save and load variables from a separate file.
  • Data Objects
    Specify properties for parameters, signals, and states, including parameter values, outside of a block diagram by using external data objects.
  • Symbol Resolution
    You can control how blocks in a model resolve symbols to variables and objects that you create in workspaces.
  • Define Data Classes
    Customize the way your model interacts with data (signals, parameters, and states) by creating your own class of data object.
  • Upgrade Level-1 Data Classes
    Simulink no longer supports level-1 data classes. You must upgrade data classes that you created using the level-1 data class infrastructure, which was removed in a previous release.

Data Storage in External Files

Related Information