Creating Graphical User Interfaces

Sharing Data Between Callbacks

You can share data between callbacks by storing it in the MATLAB handles structure. For example, to store data contained in a vector X in the handles structure, you

1. Choose a name for the field of the handles structure where you want to store the data, for example, handles.my_data
2. Set the field equal to X with the following command:

• handles.my_data = X;
  

3. Save the handles structure with the guidata function:

• guidata(hObject, handles)
  

Here, hObject is the handle to the object that executes the callback.

Note    To save any changes that you make to the handles structure, you must add the command guidata(hObject, handles) following the code that implements the changes.

To retrieve X in another callback, use the command

• X = handles.my_data;
  

You can access the data in the handles structure in any callback because hObject and handles are input arguments for all the callbacks generated by GUIDE.

For more detailed information on the handles structure, see

• Sharing Data with the Handles Structure
• Managing GUI Data with the Handles Structure

Opening Function

Adding Code to the Opening Function