??? Undefined variable "handles" or class "handles.slider1". in Guide for a function

I have 3 sliders. When I move one of the sliders I want to get the summ of Sliders Values. But summing of the Sliders Value I want to realise in separate function.

function slider1_Callback(hObject, eventdata, handles)
result;

function slider2_Callback(hObject, eventdata, handles)
result;

function slider3_Callback(hObject, eventdata, handles)
result;

function result
  x=get(handles.slider1,'Value');                       %position of X slider
  set(handles.text1,'String', num2str(x)); 

    y=get(handles.slider2,'Value');                       %position of Y slider
    set(handles.text2,'String', num2str(y)); 

    z=get(handles.slider3,'Value');                       %position of Z slider
    set(handles.text3,'String', num2str(z)); 

    result=x+y+z;
    set(handles.textResult,'String', num2str(result));

If I moves one of the slider (the 3rd for example):

??? Undefined variable "handles" or class
"handles.slider1".

Error in ==> subfunction>result at 167
x=get(handles.slider1,'Value');
%position of X slider

Error in ==> subfunction>slider3_Callback at 151
result;

Error in ==> gui_mainfcn at 96
        feval(varargin{:});

Error in ==> subfunction at 42
    gui_mainfcn(gui_State, varargin{:});

Error in ==>
@(hObject,eventdata)subfunction('slider3_Callback',hObject,eventdata,guidata(hObject))

??? Error while evaluating uicontrol Callback

I try to add (hObject, eventdata, handles) to result function, but it doesn`t help. I`m not realy good in GUIDE functions, can someone help me, please?

Answer 1

[Andrew Reibold]

Notice in all the other functions you pass in handles which allows you to access the data inside

slider1_Callback(hObject, eventdata, handles)

In your return function. You are not passing handles into it, so it doesn't know what handles is. In fact, you are not passing anything into it or out of it.

function result

Imagine your functions have no idea what is available even in the workspace before calling them unless you tell them/give it to them. You will need to pass handles into the function so that it can access it.

maybe even something simple like below would help on the path of fixing.

function result(handles)

Edit: Somehow I only read through your error message and didn't read the last line.

" try to add (hObject, eventdata, handles) to result function, but it doesn`t help. "

If adding that didn't help, I don't know that my solution would help either because extra inputs shouldn't matter.

[Eugene]

Yeah, whenI was adding

   (hObject, eventdata, handles) to result function, but it doesn`t help.

I forget, that I need to add handles to function calling in

function slider1_Callback(hObject, eventdata, handles)
result;

So I add handles, and the right variant is:

function slider1_Callback(hObject, eventdata, handles)
result (handles);

function slider2_Callback(hObject, eventdata, handles)
result (handles);

function slider3_Callback(hObject, eventdata, handles)
result (handles);

function result (handles)
  x=get(handles.slider1,'Value');                       %position of X slider
  set(handles.text1,'String', num2str(x)); 

    y=get(handles.slider2,'Value');                       %position of Y slider
    set(handles.text2,'String', num2str(y)); 

    z=get(handles.slider3,'Value');                       %position of Z slider
    set(handles.text3,'String', num2str(z)); 

    result=x+y+z;
    set(handles.textResult,'String', num2str(result));

Thank you for help.