How to show function's result from command window to a "text area or edit field" in app designer ??

I am creating an application and for that I have developed .m file for my project. This .m file is developed with OOP for keysight signal Analyzer which is working perfectly fine.

Now, I can call my functions from/in the application, but I could now show my results in the text area or edit field in the applicaiton.

Here you can have a bit more idea about it, please take a look. :-

This piece of code is from my .m file:

 %! Get the Power of the Marker-1        
        function Power = get_power(obj, id)   
        
            command0 = sprintf(':CALCulate:MARKer%d:Y?', id);
            Power = query(obj.interface, command0);
            
        end

And this is the result from Command Window for the given function:

>> obj.get_power(1)

ans =

'-4.83452345E+01'

In App Designer this is what I have tried

% Button pushed function: getMarker'sPowerButton
        function get_powerButtonPushed(app, event)
            app.obj.get_power(1);     % calling function from .m file
        end

        % Value changed function: PowerTextArea
        function TextAreaValueChanged(app, event)
          
        %???????????????????????  
        
        end

I have tried many diff. ways to solve it but did'n work out :(

Here is a picture from my design view for proper understanding.

Please help me to show this result(ans) into a text area or edit field.

Answer 1

[Voss]

function get_powerButtonPushed(app, event)
    app.PowerTextArea.Value = app.obj.get_power(1);
end

Note that this is the callback function of the pushbutton; the textarea doesn't need a callback function for this.

[Chirag]

Thank you so much Voss. Your answer really helped me =)

[Voss]

You're welcome!