What is the meaning of "global" in matlab GUI?
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What is the purpose of using these global function? Why I have to use this?
function testGUI_OpeningFcn(hObject, eventdata, handles, varargin)
handles.output = hObject;
% guidata(hObject, handles);
% set(findall(handles.uipanel1,'-property','enable'),'enable','on');
% set(handles.uipanel1,'visible','on');
% set(findall(handles.uipanel6,'-property','enable'),'enable','off');
% set(handles.uipanel6,'visible','off');
% set(findall(handles.uipanel7,'-property','enable'),'enable','off');
% set(handles.uipanel7,'visible','off');
global setting
global List
global i
setting=0;
i=1;
List=cell(15,1);
set(handles.text27,'String','Welcome to Music Listening Test');
3 comentarios
Stephen23
el 13 de Ag. de 2020
Editada: Stephen23
el 13 de Ag. de 2020
"Why I have to use this?"
You don't have to.
Using global variables makes accessing variables slow, liable to bugs, and difficult to debug.
The MATLAB documentation lists the recommended ways of passing data within a GUI:
The MATLAB documentation also advises "Use global variables sparingly, if at all."
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