MATLAB: Handles in Matlab Guide

guiguidehandles

I am having a difficult time understanding use of handles

in MATLAB's guide. WHEN TO USE THEM?

For example, this is MATLAB's example how to use MATLAB Guide:

 handles.peaks = peaks(35); 
 [x, y] = meshgrid(-8:.5:8)
 handles.current_data = handles.peaks
 surf(handles.current_data)

I guess we are using handles to pass data to the functions.

I'm confused.

Thanks,

Amanda

Best Answer

That's correct. That's one of the ways to make an otherwise local variable into a global variable so that they can be seen in other functions. Most of the other ways are discussed here: http://matlab.wikia.com/wiki/FAQ#How_can_I_share_data_between_callback_functions_in_my_GUI.28s.29.3F In your case you don't need to do that unless you're going to need those variables later, in a different function or callback function.

Related Solutions

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

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!

MATLAB: Guide

This m.file work with new version but I have Matlab 7, how can I change it to work with old version Thanks

Best Answer

Related Solutions

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

MATLAB: Guide

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