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Get the value of RoadRunner scenario variable using MATLAB

Since R2022a



    value = getScenarioVariable(rrApp,name) returns the value of a variable in the current scenario with the specified name.


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    Get a scenario variable in RoadRunner Scenario using MATLAB.

    Call the roadrunner function and pass in the location where you want to create the project. This example assumes that RoadRunner is installed in its default location in Windows.

    Specify the path to an existing project. For example, this code shows the path to a project located at "C:\RR\MyProject". This call returns an object rrApp that provides functions for performing basic workflow tasks such as opening, closing, and saving scenes and projects

    projectFolder = "C:\RR\MyProject";
    rrApp = roadrunner(projectFolder);

    Open an existing scenario in RoadRunner Scenario by calling the openScenario function and passing it the rrApp object and the specific scenario filename that you want to open. This call opens the desired scenario in the RoadRunner Scenario application through MATLAB.

    filename = "MyScenario.rrscenario";

    Get the value of a scenario variable. Call the getScenarioVariable function and pass it the rrApp object and the variable whose value you want to retrieve. For example, this call retrieves a value of 17.88 as the initial speed of the Ambulance in the scenario, MyScenario. This example has an exisiting variable, Ambulance_InitialSpeed.

    name = "Ambulance_InitialSpeed";
    value = getScenarioVariable(rrApp,name);

    Input Arguments

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    RoadRunner application associated with a project, specified as a roadrunner object. This object provides functions for performing common workflow tasks such as opening, closing, and saving scenes and projects. rrApp provides functions that support importing data from files and exporting scenes to other formats from RoadRunner.

    Name of variable to retrieve value, specified as a character vector or string scalar. If the specified variable does not exist in the scenario, it results in an error. For more details on creating variables in a scenario, see Generate Scenario Variations (RoadRunner Scenario).

    Example: getScenarioVariable(rrApp,"Ambulance_InitialSpeed); retrieves the initial speed of the Ambulance vehicle.

    Output Arguments

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    Value assigned to variable, returned as a character vector or string scalar.

    Example: getScenarioVariable(rrApp,"Ambulance_InitialSpeed"); retrieves the initial speed as 17.88 m/s assigned of the Ambulance vehicle.

    Version History

    Introduced in R2022a