Passing a block paramater value from App Designer to Simulink

Question

Ahmed Hassan 2018-8-22

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/415855-passing-a-block-paramater-value-from-app-designer-to-simulink

回答： Ashutosh Prasad 2018-8-29

Hi, I'm using App Designer to build an app to control a Simulink model. I want to change a block parameter value in Simulink and run, so I have the following lines executed when I hit the "run" button

        function RunSimButtonPushed(app, event)
            set_param('MySim/Mode1','Value','app.Mode1.Value');
            SimOutput=sim('MySim');
            app.SimOut=SimOutput;
        end

I had defined a global parameter called Mode1 in my app

    properties (Access = public)
        SimOut % Output from Simulink model run
        Mode1 % mode1 value, to be used by the Simulink model
    end

When I run the app it gives me this error: "Undefined variable "app" or class "app.Mode1.Value""

Any ideas how to fix that? Thanks.

-Ahmed

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Answer 1

Ashutosh Prasad 2018-8-29

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/415855-passing-a-block-paramater-value-from-app-designer-to-simulink#answer_334544

The quotes in the third argument of the set_param command seem quite unnecessary. If app.Mode1.Value holds a numerical value you need to typecast it to string data type using num2str function.