cannot setappdata to GUIHandles

Matlab wiki claims this exists but I cannot set or save anything to GUIHandle I tried GUIHANDLES and that didn't work either. DOes anyone know what handles are the best to pass variables in and out of functions? I don't want to use global variables

Here is what I tried below

Thanks

% Do this to save variables to your figure's workspace.
% handles.GUIHandle is the "Tag" property of your main GUI figure.
% Double-click figure to bring up the "Property Inspector" in GUIDE.
setappdata(handles.GUIHandle, 'yourVariable', yourVariable)

% Do this to retrieve variables from your figure's workspace.
yourVariable = getappdata(handles.GUIHandle , 'yourVariable')

% Do this to remove what you saved from your figure's workspace.
rmappdata(handles.GUIHandle, 'yourVariable')

Answer 1

[Walter Roberson]

At the place that GUIHandle appears, you need to use the same name as you set for the Tag property of your figure.

Like the comment says above, "Double-click figure to bring up the "Property Inspector" in GUIDE." You can set the Tag property from there.

[Image Analyst]

For what it's worth, I always call the tag for my main GUI "figMainWindow". So it's always the same and I never have to try to remember what I called a particular one. If my main GUI calls other subordinate, helper GUIs, then I give them a slightly different name, like figSettings or something. I also expanded the explanation in the FAQ to try to make it more clear what you have to do.

[William]

An excellent Idea thank you