How can I use quadprog in Simulink?

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Saleh Msaddi
Saleh Msaddi 2020-3-23
评论： Saleh Msaddi 2021-3-8
Hello everyone,
I am using quadprog in a MatLab function in Simulink. When I run the simulation, I get the following error "Function 'quadprog' not supported for code generation". My purpose is running a simulation and interpreting the results, I don't want to generate any code from the model.
Any suggestions on how I can solve this issue?
Thanks in advance.

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Saleh Msaddi
Saleh Msaddi 2020-3-23
编辑：Saleh Msaddi 2020-3-23
It appeared that most of the Optimization Toolbox functions supported with Embedded MATLAB, and quadprog is one of these upsupported functions. Since I am not interested in code generation, I figured out that I can use the following command in my function block, and it works perfectly!
coder.extrinsic('quadprog');
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Syed Ahmad Nadeem
Syed Ahmad Nadeem 2020-6-21
Thank you for the information Saleh. I tried using the code you mentioned above to work with the quadprog function in matlab embedded function. On using it I a receive another set of errors as:
'inner matrix dimensions must agree'
Simulink cannot determine sizes and/or types of the outputs for block 'linear_model_check/MPC controller' due to errors in the block body, or limitations of the underlying analysis. The errors might be inaccurate. Fix the indicated errors, or explicitly specify sizes and/or types for all block outputs.
I tried exploring these errors further and it seems these generate from the command statement where I try to assign the outputs of 'quadprog' function to some variable name. If you could point in some direction, it would be really helpful. I am using Matllab 2018a, and trying to avoid the upgradation to 2020a.
Saleh Msaddi
Saleh Msaddi 2020-6-21
Dear Syed, try using the signal speicifer to specify the quadprog output signal properties. Check https://www.mathworks.com/help/simulink/slref/signalspecification.html
Regards

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Mary Fenelon
Mary Fenelon 2020-4-21
Code generation support for quadprog was added in R2020a.
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li gu
li gu 2021-3-8
I want to ask why I upgrade matlab to 2020, but still report an error to show that this function cannot generate code?
Saleh Msaddi
Saleh Msaddi 2021-3-8
Use the following function in the first beginning of your MATLAB Function,
coder.extrinsic('quadprog');
Also, make sure to use a "signal specification" block to specify the dimenasion of the signal produced by the quadprog function

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