AppDesigner use of extern function and variables

hello i have written a function in Matlab:

function [cquad] = aquad(aquadv,bquadv)
%UNTITLED2 Summary of this function goes here
%   Detailed explanation goes here
cquad = sqrt(aquadv^2+bquadv^2);
end

and now wants to output them to the Appdesigner GUI at the touch of a button.

   methods (Access = public)
        
        function c = aquad(app,aquadv,bquadv)
        end
    end
    

    % Callbacks that handle component events
    methods (Access = private)

        % Button pushed function: Button
        function ButtonPushed(app, event)
            aquadv=app.aEditField.Value;
            bquadv=app.bEditField.Value;
%             c = aquad(app,aquadv,bquadv)
            cEditField.Value=c
        end
        end

no matter how I try, I always get different flaws

Answer 1

[Geoff Hayes]

prrrrr - so long as the aquad function can be found within the MATLAB search path, then you can just call it directly from App Deisgner. You can remove the method here

methods (Access = public)
    function c = aquad(app,aquadv,bquadv)
    end
end

as this should just be for methods of the app so you would instead have just

methods (Access = public)
end

or I suppose you could remove this altogether. Then in the push button callback, you would do

% Callbacks that handle component events
methods (Access = private)
    % Button pushed function: Button
    function ButtonPushed(app, event)
        aquadv=app.aEditField.Value;
        bquadv=app.bEditField.Value;
        cEditField.Value = aquad(aquadv,bquadv);
    end
end

The above will hopefully work...