matlab pass recent loaded value to next gui

I'm new to matlab and i make two GUI using the guide, i get an error on my second GUI that variable is undefined. here is the code from first gui:

 {
function load_image_Callback(hObject, eventdata, handles)
 [Filename, Pathname] = uigetfile('*.*', 'Select leaf image');
 % Data input; fetches for the image file.
leaf = fullfile(Pathname, Filename);
   [y,x,z]=size(leaf);
if x>800 
   leaf=imresize(leaf,0.5);     
end
}

the error says that 'leaf' is undefined. how can i fix this ? please help. thanks

Answer 1

[Sean de Wolski]

leaf is destroyed at the end of the function. To pass it to the next function, see the FAQ:

Pass variables between GUI callbacks