MATLAB GUI Button Counter

Hi, I'm looking to create a button counter such that each time this particular button is pressed, the counter increases by 1. However, it's not working. My code is below.

I realize that "handles.count==1;" is what's causing the code to keep referring to "if handles.count==1". However, if I remove "handles.count==1", the code does not work at all. Can anyone give me assistance to get the counter to work?

FYI: "fcn" is a function i already created.

function start_Callback(hObject, eventdata, handles)

% hObject    handle to start (see GCBO)

% eventdata  reserved - to be defined in a future version of MATLAB

% handles    structure with handles and user data (see GUIDATA)

handles = guidata(gcbo); 

handles.count = 1;

if handles.count == 1

      handles.count= handles.count+1;
      fcn(1)
      handles.count = 2;
  elseif handles.count == 2
      handles.count= handles.count+1;
      fcn(2)
  elseif handles.count == 3
      handles.count= handles.count+1;
      fcn(3)
  else   
      set(hObject, 'enable', 'off') 
  end

[hardik sanghvi]

This code is for infinite no to be count or limited count

[hardik sanghvi]

For 100 count code will be ? Pls tell

Answer 1

[Sean de Wolski]

Something like this for all it (accept the enable off when it gets to 4).

val = str2double(get(handles.count,'string'));
fcn(val);
set(handles.count,'string',num2str(val+1));

More Since the button being pressed is the one to be augmented:

val = str2double(get(hObject,'string'));
fcn(val);
set(hObject,'string',num2str(val+1));

Answer 2

[No Name]

If I place that snippet of code in my code (above my if-else statements), I get these errors:

??? Error using ==> get
Invalid handle object.

Error in ==> GUI>start_Callback at 134
val = str2double(get(handles.count,'string'));

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

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

Error in ==> @(hObject,eventdata)GUI('start_Callback',hObject,eventdata,guidata(hObject))

??? Error while evaluating uicontrol Callback

[Sean de Wolski]

Well do you have a button named count? Apparently not. It looks like you named the button 'start'. If you put a break point on the line val =... and push the button:

What are the fields of handles.

Actually you could skip the call to handles altogether if the button being pressed is the one running the callback and just use hObject. See addendum