Storing workspace variable in GUI for use by other push buttons. MATLAB GUI

问题

I have just started making a basic GUI with GUIDE, so far I have one push button that I am using to call a .m file I wrote earlier called sortData.m

When run outside of the GUI, sortData.m puts a matrix called "merge" into the workspace, but when I run sortData.m inside the GUI nothing happens.

I need "merge" to get stored somewhere so that my next push button can use it to output figures... how can this be done? Thanks

% --- Executes on button press in pushbutton1.
function pushbutton1_Callback(hObject, eventdata, handles)
% hObject    handle to pushbutton1 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
sortData

回答1:

You can store the result inside your GUI for later use, i.e:

% --- Executes on button press in pushbutton1.
function pushbutton1_Callback(hObject, eventdata, handles)
% hObject    handle to pushbutton1 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
handles.mydata = sortData;
guidata(hObject, handles);

Or you can retrieve the data from workspace when you need it, i.e:

my_merge = evalin('base', 'merge');
% do anything with my_merge here
% note that nothing affects matrix merge in workspace

回答2:

1. modify sortData-> make it a function by adding this as the first line:

   function merge = sortData(..)

2. modify the callback:

   function pushbutton1_Callback(hObject, eventdata, handles) merge = sortData handles.merge = merge guidata(hObject, handles);

later, within any callback that gets the handles-struct, you can retrieve the data with handles.merge. Check the documentation for more about data-sharing, see (for example):

• TMW-newsreader
• TMW: documentation guidata

来源：https://stackoverflow.com/questions/31910132/storing-workspace-variable-in-gui-for-use-by-other-push-buttons-matlab-gui