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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.

Functions

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Simulink.findVarsAnalyze relationship between variables and blocks in models
matlab.io.saveVariablesToScriptSave workspace variables to MATLAB script
Simulink.data.evalinGlobalEvaluate MATLAB expression in context of Simulink model
Simulink.data.assigninGlobalModify variable values in context of Simulink model
Simulink.data.existsInGlobalCheck existence of variable in context of Simulink model
Simulink.data.dictionary.createCreate new data dictionary and create Simulink.data.Dictionary object
Simulink.data.dictionary.openOpen data dictionary for editing
Simulink.data.dictionary.getOpenDictionaryPathsReturn file names and paths of open data dictionaries
Simulink.LibraryDictionary.clearClear library dictionary dependency analysis
Simulink.LibraryDictionary.refreshUpdate library dictionary dependencies
Simulink.LibraryDictionary.resetLibraryLinksClear cached information on library dictionary links

Classes

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
Simulink.data.DictionaryConfigure data dictionary
Simulink.data.dictionary.SectionConfigure data dictionary section
Simulink.data.dictionary.EntryConfigure data dictionary entry
Simulink.data.dictionary.EnumTypeDefinitionStore enumerated type definition in data dictionary

Topics

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

  • Determine Where to Store Variables and Objects for Simulink Models
    Model data are objects and variables that you create in workspaces such as the base workspace or a data dictionary. Choose a technique to permanently store that data.
  • 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.

Related Information