How to call an app design function from an external .m file

Hi, I have an app design application myapp.mlapp and a function myfunc.m

in the app designer myfunc is called and it should calculate something for me and then plot a dada, this plot should be drawn in an UI Axes of myapp app design but i don't know how to do this.

I tied these:

1. Making an object of mlapp file and then call the axes:

   app = myapp;
   plt = app.UiAxes1;
   plot(plt,x,y);

but this code run myapp each time and i don't want to run myapp because its open already.

2. Calling a function in myapp

i made a function called func2 in app design code view and wanted to call it and let it does the things like:

   app = myapp;
   app.func2(x,y);

but it doesn't pass the x,y to the func2 in app designer, how can i solve this?

Regards.

Answer 1

[Cris LaPierre]

I think this post addresses your issue, though perhaps not clearly.

Basically, in your app, you want to create a public function (in the code browser, switch to "Functions" and click on the drop down arrow next to the green "+" and select "Public F.unction). Here's a made up example that accepts x and y as inputs and returns x.*y as an output.

    methods (Access = public)
        
        function results = signalFunc(app,x,y)
            plot(app.UIAxes,x,y);
            results = x.*y;
            
        end
    end

Then to call the function externally (assuming my app is saved as myApp1.mlapp), use the following code

x = 0:.01:2*pi;
y = sin(x);

a = myApp1;
b = signalFunc(a,x,y);

[Iman Fakhari]

thanks for you response, but what is vidStream? and where did you mention to "myApp1" in your code?

[Cris LaPierre]

I've updated my code. I was working with another example and meant to change the names to something generic. It should make sense now.

[Iman Fakhari]

you know the problem is this line:

a = myApp1;

The code caused my app run again. but i don't want this, because it's opened already.

[Yogesh Yadav]

Did you figure out how to do this without running the app again in a new window?

[Cris LaPierre]

The simplest solution would be to only run the code a=myApp1 if a does not exist. Something like this might work.

...
if ~exist('a')
    a = vidStream;
end
...