passing GUI workspace variables to simulink model

Question

Philip 2013-12-29

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https://ww2.mathworks.cn/matlabcentral/answers/110962-passing-gui-workspace-variables-to-simulink-model

评论： Azzi Abdelmalek 2013-12-29

I'm having an issue getting my GUI and Simulink model to place nice together.

My GUI has a great many fields that the user can customize with input, values for k0, k1, k2, b0, b1 etc.

Upon pressing a button, my GUI should call a simulink model that I have already made to evaluate the system.

My problem is that when I run the sim('modelname') command (with modelname replaced by my own model's name), the variables I have in the workspace aren't passed along, so MATLAB tells me "error evaluating parameter..." and "undefined function or variable 'k0' for all the variables I had just imported from my GUI.

I had originally looked around and tried to pass them to simulink, creating a parameter variable that has parameter.k0 = k0; etc for all the values and then running sim('modelname', parameter); however, this gives me the error block_diagram does not have a parameter named "L".

How do I run my Simulink model from my GUI using the variables it needs in the correct workspace?

kind regards,

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Answer 1

Azzi Abdelmalek 2013-12-29

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https://ww2.mathworks.cn/matlabcentral/answers/110962-passing-gui-workspace-variables-to-simulink-model#answer_119597

You can use set_param function

Look also at Control Simulation Using the set_param Command

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Philip 2013-12-29

set_param gives me a similar error, telling me "Block-diagram does not have a parameter 'k0'".

Does this mean I need to set every instance where a variable is used (each gain, each subfunction) separately with its own set_param line? This would totally negate the advantage of declaring variables for the varying blocks.

Is there no way to share variables between workspaces short of making them global?