how to solve the uicontrol callback errors in gui for regonition

gui_Singleton = 1; gui_State = struct('gui_Name', mfilename, ... 'gui_Singleton', gui_Singleton, ... 'gui_OpeningFcn', @MAIN_OpeningFcn, ... 'gui_OutputFcn', @MAIN_OutputFcn, ... 'gui_LayoutFcn', [] , ... 'gui_Callback', []); if nargin && ischar(varargin{1}) gui_State.gui_Callback = str2func(varargin{1}); end

if nargout [varargout{1:nargout}] = gui_mainfcn(gui_State, varargin{:}); else gui_mainfcn(gui_State, varargin{:}); [LINE 28] end

************************************************ ERROR:- Error in MAIN (line 28) gui_mainfcn(gui_State, varargin{:});

 --- Executes on button press in RECOGNITION.
function RECOGNITION_Callback(hObject, eventdata, handles)
% hObject    handle to RECOGNITION (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
rec=handles.N;        {LINE 260] 
TrainDatabasePath = ('C:\pro_mat_file\Sap_codes\int_pro\project\TrainDatabase\');
TestDatabasePath =( 'C:\pro_mat_file\Sap_codes\int_pro\project\TrainDatabase\');
v=rec;
 for j = 1:v
     TestImage  = num2str(j);
     s=strcat('a',TestImage);
     TestImage = strcat(TestDatabasePath,'\',char( TestImage),'.jpg');
     T = CreateDatabase(TrainDatabasePath);
     [m, A, Eigenfaces] = EigenfaceCore(T);
     OutputName = Recognition(TestImage, m, A, Eigenfaces);
     SelectedImage = strcat(TrainDatabasePath,'\',  OutputName);
     SelectedImage = imread(SelectedImage);
     axes(eval(['handles.axes', num2str(s)]));
     imshow(SelectedImage);
 end
%

****************************************** ERROR:- Reference to non-existent field 'N'.

Error in MAIN>RECOGNITION_Callback (line 260) rec=handles.N;

Error in @(hObject,eventdata)MAIN('RECOGNITION_Callback',hObject,eventdata,guidata(hObject))

Error while evaluating uicontrol Callback

Answer 1

[Image Analyst]

There is no field called N on the handles structure. If you set it somewhere, in some other function, then you forgot to either pass handles back out of that function, or you didn't call guidata().

[dhvani patel]

respected sir, thanking you.. i hav kept the entire codes in the other questions that will be easy for u to recognize the error..

Answer 2

[Eliza Tham]

HI, are you able to solve the problem? i am also running the same code gotten online and happen to face the same problem.

[Image Analyst]

My answer would have solved it. Post your m-file and fig file in a new question so we can solve your related problem too.