MATLAB: App Designer: Using function outputs as variables within other functions

app designerfunctionsMATLABmethodspropertiesvariables

I would like to store a variable as an output from a function in App Designer for use with other functions. Please see the simple example below.
properties (Access = private)
      x = linspace(0,1,10); % Description
  end
    methods (Access = private)
        function [y] = func(app)
            A = app.EditField.Value;
            B = A + 1;
            y = app.x.^2 + B;
            plot(app.UIAxes,app.x,y)                     
        end
I wish to use the variable 'y' from func(app) for use within the second function, func2(app).
        func2(app)
            plot(app.UIAxes2,app.x,y)
        end
    end
Any help would be appreciated, the example is trivial as both plots plot the same graph. I am just unaware of the syntax required as the App Designer environment has slight modifications from that of the usual MATLAB workspace.
Any help would be very appreciated,
Sam
(Using R2017b)

Best Answer

Hi Sam,
The best way of storing data in one function in an AppDesigner app for use in another function is to create a new 'property', and set the property's value instead of creating a new local variable. Then, in your other functions, you have access to the app's properties and can use any property as needed.
The following documentation page describes this process in more detail, with examples:
https://www.mathworks.com/help/matlab/creating_guis/share-data-across-callbacks-in-app-designer.html
For example, create a new property 'y' in your 'properties'.
properties (Access = private)
    x = linspace(0,1,10); % Description
    y;  
end
Then, in func(app), set
app.y = app.x.^2 + B;
Then, in func2(app), you can have
plot(app.UIAxes2,app.x,app.y)
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