Hello,
From my understanding, you are not able to access the variables defined in one callback in another callback within the same app.
You have to use 'Properties' to access variables across functions and callbacks. You can either create a Public or Private Property, the process is explained here but here are the steps described briefly:
- From the editor tab in App Designer, select the red option 'Property' dropdown button at the top and select "Private Property". This will add a property definition to a properties block in the code.
- Within that newly added section, you can define any variable name that you want to use across callbacks, in your case 'w2' (see section 1 below)
- In your 'DropDownW2ValueChanged()' function, use 'app.' to reference this variable (declared in property) and assign some value. (see section 2)
- Now when you want to access this variable in any other callback use the same 'app.' to reference it. (see section 3)
% Section 1
properties (Access = private)
w2 = 0; % This variable is expected to be used across different callbacks
end
% Section 2
function DropDownW2ValueChanged(app, event)
app.w2 = (2*pi*wa2)/60; % Assigning values to the property variable declared for this app
end
% Section 3
function CalcularButtonPushed(app, event)
z3C = app.w2*(a4+(w4^2)*j)-w4*(a2+(app.w2^2)*j); % Using the same property variable in calculations
end
So, this means any property variable has to be referenced using 'app.' .This ensures the variable is present in the scope which is common to all callbacks / functions in the app.
NOTE: This property variable name should be unique. It should not be the same as any another property variables defined in another app and being passed to this app.
