error in displaying image

I have a code

function pbRecognize_Callback(hObject, eventdata, handles)
% hObject    handle to pbRecognize (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
charvec = handles.charvec;
selected_net = get(handles.editNN,'string');

selected_net = evalin('base',selected_net);

result = sim(selected_net,charvec);
[val, num] = max(result);
set(handles.editResult, 'string',num);

from a gui http://www.mathworks.com/matlabcentral/fileexchange/8676

i tried sing the code without using GUI BUT I GET ERROR ,UNDEFINED VARIABLE selected_net

PLEASE HELP

Answer 1

[Image Analyst]

Why do you have this line:

selected_net = evalin('base',selected_net);

when you've just retrieved it from the "editNN" edit text box? Where is selected_net supposed to originate? Also, I don't see where it's trying to display an image (no image(), imagesc() or imshow()). Did you modify the downloaded code in any way? Did you try to contact the author?