What is the problem in the code? I am using R2011a

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Sameer 2014-3-4

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关闭： MATLAB Answer Bot 2021-8-20

Undefined function or variable 'myname'.

Error in ==> SAM_1>pushbutton1_Callback at 82 if (length(myname) ~= NULL) && (length(mypass) ~= NULL)

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

Error in ==> SAM_1 at 42 gui_mainfcn(gui_State, varargin{:});

Error in ==> @(hObject,eventdata)SAM_1('pushbutton1_Callback',hObject,eventdata,guidata(hObject))

??? Error while evaluating uicontrol Callback

MY CODE IS :

function pushbutton1_Callback(hObject, eventdata, handles) handles = guidata(hObject); if (length(myname) ~= NULL) && (length(mypass) ~= NULL) open('hr.jpg'); end guidata(hObject,handles);

function uname_Callback(hObject, eventdata, handles) handles = guidata(hObject); handles.myname = get(hObject,'String'); guidata(hObject,handles);

function tpass_Callback(hObject, eventdata, handles) handles = guidata(hObject); handles.mypass = get(hObject,'String'); guidata(hObject,handles);

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Answer 1

dpb 2014-3-4

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Please format your code so I don't have to... :(

function pushbutton1_Callback(hObject, eventdata, handles) 
  handles = guidata(hObject); 
  if (length(myname) ~= NULL) && (length(mypass) ~= NULL) 
    open('hr.jpg'); 
  end
  guidata(hObject,handles);
function uname_Callback(hObject, eventdata, handles) 
  handles = guidata(hObject); 
  handles.myname = get(hObject,'String'); 
  guidata(hObject,handles);
function tpass_Callback(hObject, eventdata, handles) 
  handles = guidata(hObject); 
  handles.mypass = get(hObject,'String'); 
  guidata(hObject,handles);

I don't do GUIs so I don't "know nuthink" about the callbacks and the objects but you refer to a variable myname in the pushbutton1_Callback function whereas the uname_Callback function stuffs it into the handles object as a named field.

Whether the right object is getting passed or not is at a deeper level thatn I know; only that you'll have to refer to it as handles.myname to retrieve it...