how to solve the uicontrol callback errors in gui for regonition

Question

dhvani patel 2015-3-10

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/182421-how-to-solve-the-uicontrol-callback-errors-in-gui-for-regonition

评论： Image Analyst 2015-3-19

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

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Answer 1

Image Analyst 2015-3-10

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/182421-how-to-solve-the-uicontrol-callback-errors-in-gui-for-regonition#answer_170762

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().