Passing variables in a GUI

Hi, I have a problem in a GUI: I have need of two function (fun1 and fun2) which can be activated or not (due to the activation of two check buttons). If both are activated, i need to pass some variables from fun1 to fun2.

Once it run (one or both functions) i should pass the results to another function (grafic_fun) which plot the final results.

The problem is that the others functions (fun2 and grafic_fun) don't read the variables (handles.var) that I have defined within the functions fun1 and fun2 ; the matlab's error: ?? Reference to non-existent field 'var1'.

The code are something like this:

   function pushbutton_run_Callback(hObject, eventdata, handles)
    % hObject    handle to pushbutton_run (see GCBO)
    % eventdata  reserved - to be defined in a future version of MATLAB
    % handles    structure with handles and user data (see GUIDATA)
    if handles.check_fun1==1&&handles.check_fun2==1
        fun1(hObject,handles)
        fun2(hObject,handles)
        grafic_fun(hObject,handles)
    elseif handles.check_fun1==1&&handles.check_fun2==0
        fun1(hObject,handles)
        grafic_fun(hObject,handles)
    else
        fun2(hObject,handles)
        grafic_fun(hObject,handles)
    end

    function fun1
    ...
    handles.var1=...
    handles.var2=...
    guidata(hObject,handles)

    function fun2
    ...
    handles.var3=handles.var1+....
    guidata(hObject,handles)

    function grafic_fun(hObject,handles)
    ...
    plot(x,handles.var)
    guidata(hObject,handles)

thanks and sorry for my bad english!!

[Azzi Abdelmalek]

Matteo3 commented

Sorry, I have forget to write, the correct definition of functions is:

    function fun1(hObject, handles)
    ...
    handles.var1=...
    handles.var2=...
    guidata(hObject,handles)

[Azzi Abdelmalek]

And what is the problem?

[Matteo3]

That in fun2(hObject, handles), the espression

handles.var3=handles.var1

where handles.var1 is defined in fun1(hObject, handles), return:

?? Reference to non-existent field 'var1'.

[Azzi Abdelmalek]

Maybe, in your filename_openingFcn you should initialize

handles.var1=....

[Matteo3]

thanks!!

Answer 1

[Amit]

This is because fun1 and fun2 do not know the existence of handles inside that function.

You can try something like this:

function [var1 var2] = fun1

function var3 = fun2(var1,var)

Answer 2

[Azzi Abdelmalek]

In your function arguments, add a variable handles. for example

function y=fcn1(a,b,handles)