MATLAB GUI set handles text problem.

 if T==1
    Disp  = '1'
elseif T==2
    Disp  = '2'
elseif T==3
    Disp  = '3'
elseif T==4
    Disp  = '4'
elseif T==5
    Disp  = '5'
elseif T==6
    Disp  = '6'
elseif T==7
    Disp  = '7'
 else 
 end
 set(handles.text6,'string',Disp)

After number of elseif conditions i am writing above program. I am using GUI method. I am getting error as below.

 Reference to a cleared variable handles.

 Error while evaluating uicontrol Callback

How i can overcome it.! My all Disp values are Numeric only.!

[Walter Roberson]

Please show the complete callback function code, and please include the complete error message, everything in red.

[Geoff Hayes]

Nimisha - you should also handle the case where T is not one of the values in the interval 1-7. Your else condition has no body and so the Disp variable may never be set.

[Nimisha]

 function pushbutton10_Callback(hObject, eventdata, handles)
% hObject    handle to pushbutton10 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
clear all;clc
load Features.mat
t = a;
[P Q] = size(t);
load FeaturesData1.mat
s = testfea;
for i = 1:P
d(:,i) = dtw(s,t(i,:));
end
W = min(d);
[R T] = find(W ==d);
if T==1
    Disp  = '1'
elseif T==2
    Disp  = '2'
elseif T==3
    Disp  = '3'
elseif T==4
    Disp  = '4'
elseif T==5
    Disp  = '5'
elseif T==6
    Disp  = '6'
elseif T==7
    Disp  = '7'
else 
end
set(handles.text6,'string',Disp)

THIS IS MY COMPLETE CALL BACK FUNCTION.

AND ERROR MESSAGE IS AS BELOW.

 Reference to a cleared variable handles.

 Error in HandGesture>pushbutton10_Callback (line 434)
 set(handles.text6,'string',Disp)

 Error in gui_mainfcn (line 96)
         feval(varargin{:});

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

 Error in   @(hObject,eventdata)HandGesture('pushbutton10_Callback',hObject,eventd ata,guidata(hObject))

 Error while evaluating uicontrol Callback

[Geoff Hayes]

Nimisha - if you always observe this error, then please put a breakpoint at the line

 set(handles.text6,'string',Disp)

and then launch your GUI. Do whatever you normally would do and then press pushbutton10. Once the debugger pauses at this line, then look at the handles structure. Is it valid? Does it have a field named text6?

Answer 1

[Walter Roberson]

Delete your "clear all". It is removing the content of "handles"