How to share variables across GUIs?

As it said in title,there is a variant Num1 in GUI1, I hope that in GUI2 Num1 can changged, how ? Thank you!

[Jan]

What does "variant Num1 in GUI1" exactly mean? Is this the tag of an uicontrol, a variable in the application data set by guidata() or a field in a struct stored in the UserData?

[Lisa Wu]

In GUI1:

function edit1_callback()

    num1 = get(hObject,'string');
    handles.num1=num1;
    guidata(gcbo,handles);

In GUI2，how can i use handles.num1 ? Thank you!

Answer 1

[Arthur]

I prefer to store and share data with the function setappdata and getappdata. This is, in my opinion, more clear and better structured.

Watch this video on how it works: http://www.mathworks.com/matlabcentral/fileexchange/8616

Answer 2

[Walter Roberson]

If you used GUIDE, you need to use guidata() on the figure number for GUI2 in order to get GUI2's handle structure in GUI1. Then you can change things in the normal way. For example,

handles2 = guidata(GUI2_figure);
set(handles2.Num1, 'Value', get(handles.Num1, 'Value'))

[Lisa Wu]

When I put the aboves commands in pushbutton1 of GUI1, error:【Erroring using get; Convertion to duoble from cell is impossible.】

So where to put above command? Thank you very much!