How to use varargout function with matlab coder?

Hi, i'm trying to convert my Matlab script into C with Matlab Coder app but i'm having a problem, when app get into the "Check for Run-Time Issue" window it tells me: Top-level function cannot have varargout.

I'm not a programer so i have only basic knowledge. How can i procede to overcome this issue?

Thks!

Answer 1

[Ryan Livingston]

Starting in MATLAB R2017b, MATLAB Coder supports varargout in entry-point functions. The documentation:

https://www.mathworks.com/help/coder/ug/specify-number-of-input-or-output-arguments-to-generate.html

covers this in more detail.

In earlier releases, you can have a wrapper with explicit output arguments. So if you are trying to generate code for

function varargout = entryPoint(a,b,c)
...
end

you can instead use

function [out1,out2,out3] = entryPointWrapper(a,b,c)
[out1,out2,out3] = entryPoint(a,b,c);
end

and generate code from entryPointWrapper.

[Jucimar Carpe]

Hi Ryan, first of all, thank you for your help. I'm sorry but i didn't get it how do i should put in my code.

I'm currently using the Matlab 2015 version, so i will use the second option you gave me.

If i understood, the script you send me, i should use the second one you wrote. I'hva e many inputs and many outputs even 3 fugures. How should do it?

Attached is my currently script.

Thanks...

[Ryan Livingston]

Yep, the second option, using a wrapper function without varargout, is the best way forward.

That said, looking at your script since there is a lot of plotting and graphics, MATLAB Coder isn't the best tool. As Kojiro Saito and Fred Smith and said in your other question:

https://www.mathworks.com/matlabcentral/answers/430030-creating-a-c-from-from-a-script?s_tid=prof_contriblnk

MATLAB Compiler would be a better tool for your application because of the plotting/app code.

[Jucimar Carpe]

Hi Ryan, i already done by matlab compiler and created my GUI interface but the i was trying to codify do C, but it's ok. Thanks for the help!