How to call pop-up-menu call back in Pushbutton???

Hi I'm making my Gui to classify images. For this purpose i'm using two methods Neural network (NN) and kth nearest neighborhood (KNN) method for that i used popupmenu to select one of the method.. But problem is that i'm forming handles field in opening function. By using these fields I initially display image using popupmenu. If I select Knn method it display Knn image But Problem is that when I select NN method it donot display NN image but I want to display it. The opening function code and popup menu code is given as if true function sabih_expression_OpeningFcn(hObject, eventdata, handles, varargin)% code O5=imread('k-nn.png'); handles.KNN=O5; handles.main=handles.KNN; O6=imread('nn.png'); handles.NN=O6; handles.nnet=handles.NN; handles.output = hObject; guidata(hObject, handles); end

and pop up menu code is

if true
function method_popup_Callback(hObject, eventdata, handles)   % code
% hObject    handle to method_popup (see GCBO)

% eventdata reserved - to be defined in a future version of MATLAB

% handles structure with handles and user data (see GUIDATA)

% Hints: contents = cellstr(get(hObject,'String')) returns method_popup contents as cell array

% contents{get(hObject,'Value')} returns selected item from method_popup

val=get(hObject,'Value');

str=get(hObject,'String');

switch str{val};

case 'KNN'

handles.main=handles.KNN;

a=handles.main;

imshow(a,'parent',handles.axes4);

    case 'NN'
         handles.nnet=handles.NN;
         b=handles.nnet;
         imshow(b,'parent',handles.axes4);

end guidata(hObject, handles); % code end

it displays image when I select Knn but donot display image when I select NN.

2ndly how can I use call back of popupmenu in pushbutton.. (As im new gui programmer)

I have two pushbuttons When execute knn data and other execute NN data. I want to use button such that when I select knn in popup menu then only Knn pushbutton works if NN pushbutton is pushed when knn is selected it displays warning...

Thanks If someone help me out I shall be very thankful.....

Regards

Ali Ahmed

[Jan]

Please lern how to format code in the forum properly.

[Ali Ahmed]

yup I'll try my level best.

Answer 1

[Yao Li]

Try remove the selections codes from the opening function to other callback functions And try

get(handles.method_popup, 'Value');

to get the current selection of the popupmenu

[Ali Ahmed]

Thanks for answering me. The code line you mention above is for calling popupmenu in other function call backs.

Can you help me out with my first problem as it display image for only first selection not for 2nd??

thanks.

[Yao Li]

I guess that is because you call the popupmenu callbacks in the opening function which is effective only when you open the GUI. Thus, try to remove the selection codes to other callbacks, such as popupmenu_CreateFcn. I'm not sure about that since I can't see all your functions here.

[Ali Ahmed]

Thanks Yao Li i'm trying what you suggest and I found me very helpful Thanks once again..