how do i transfer matrix variable of an image from gui callback function to a another call back function (pushbutton1_Callback ----> pushbutton2_Callback)

function pushbutton1_Callback(hObject, eventdata, handles)

handles.imgin = uigetfile();

guidata(hObject,handles)

i need to transfer loaded image matrix variable to below function

function pushbutton2_Callback(hObject, eventdata, handles)

imgin = guidata(hObject,handles.imgin);

but i fail to get the loaded image matrix from here

[Stephen23]

How about simply reading the MATLAB documentation?:

http://www.mathworks.com/help/matlab/creating_guis/share-data-among-callbacks.html

Answer 1

[Geoff Hayes]

Tishan - you don't need to use guidata to access the field of handles that has been update with imgin. Rather than doing

 function pushbutton2_Callback(hObject, eventdata, handles)
 imgin = guidata(hObject,handles.imgin);

just do

 function pushbutton2_Callback(hObject, eventdata, handles)
 if isfield(handles,'imgin') 
     imgin = handles.imgin;
     % rest of code goes here
 end

Try the above and see what happens!

Answer 2

[Image Analyst]

Geoff's solution is one of several suggested in the FAQ. See the FAQ if you want to see alternatives. http://matlab.wikia.com/wiki/FAQ#How_can_I_share_data_between_callback_functions_in_my_GUI.28s.29.3F