Closing a Gui with button whilst within a infinite while loop?

If I had a program like below I get error messages when trying to quit out of the GUI, why is this. I want it so that I can quit the program with no errors. I have seen examples of using uicontrol but how would I exit the while loop with a button already in the GUI?

function Generate_Callback(hObject, eventdata, handles)
% hObject    handle to Generate (see GCBO)
% eventdata;  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
while(get(handles.Stop,'Value')==0)
  C=str2num(get(handles.c,'string'));
  axes(handles.graph);
  x=0:0.1:4*pi;
  y=sin(x+C);
  plot(x,y);
  pause(0.05);
end

% --- Executes on button press in Stop.
function Stop_Callback(hObject, eventdata, handles)
% hObject    handle to Stop (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
pause(0.1);
close all;

-----------------------------------------------

Errors

Error using matlab.ui.control.UIControl/get Invalid or deleted object.

Error in practice>Generate_Callback (line 81) while(get(handles.Stop,'Value')==0)

Error in gui_mainfcn (line 95) feval(varargin{:});

Error in practice (line 42) gui_mainfcn(gui_State, varargin{:});

Error in matlab.graphics.internal.figfile.FigFile/read>@(hObject,eventdata)practice('Generate_Callback',hObject,eventdata,guidata(hObject)) Error while evaluating DestroyedObject Callback

Answer 1

[Adam]

doc uicontrol properties

Look at the section on the Interruptible property. This is what you will need for the control that triggers the infinite callback. I don't have time to give examples or explain much, but the help gives detail on the scenarios that it covers.