|MATLAB Function Reference|
Store or retrieve application data
stores the variable
data in the figure's application data. If object_handle is not a figure handle, then the object's parent figure is used.
data can be any MATLAB variable, but is typically a structure, which enables you to add new fields as requred.
Note that there can be only one variable stored in a figure's application data at any time. Subsequent calls to
guidata(object_handle,data) overwrite the previously created version of
data. See the Examples section for information on how to use this function.
data = guidata(object_handle)
returns previously stored data, or an empty matrix if nothing has been stored.
guidata provides application developers with a convenient interface to a figure's application data:
gcbo), without needing to find the figure's handle.
guidata is particularly useful in conjunction with
guihandles, which creates a structure in the figure's application data containing the handles of all the components in a GUI.
In this example,
guidata is used to save a structure on a GUI figure's application data from within the initialization section of the application M-file. This structure is initially created by
guihandles and then used to save additional data as well.
You can recall the data from within a subfunction callback routine and then save the structure again: