How to retrieve intermediate variables from a callback function?

Hi,

I was working on the app designer in matlab which has 3 buttons. For the first two buttons it prints the entrance time and exit time as sprint variables which are extracted from the clock function once the button is clicked. I want to use the two variables when the clock function is used to subtract them when the third button is clicked.

        %Button1 button pushed function
        function Button1ButtonPushed(app)
            A1 = clock;
            fix(A1)
            E1 = sprintf('\n%2.0f:%2.0f:%2.0f',A1(4),A1(5),A1(6));
            app.Enter1.Value = E1;          
        end

        % Button2 button pushed function
        function Button2ButtonPushed(app)
            B1 = clock;
            fix(B1)
            S1 = sprintf('\n%2.0f:%2.0f:%2.0f',B1(4),B1(5),B1(6));
            app.Exit1.Value = S1;
        end

        % Button3 button pushed function
        function Button3ButtonPushed(app)
            T = etime(B1,A1);
       end

Answer 1

[Adam]

app should be an object of a class so it has properties. You can add your own properties and then you have access to these anywhere where you have the app available.

e.g.

properties
    someProp;
end

In your case though you seem to already have what you want stored in app.Exit1.Value so you can just access this in your 3rd callback.

If it is something else you want to store then you can just do so as e.g.

app.someProp = 7;

and then access this in any other callback.