MATLAB Programming

Creating and Executing Callback Functions
msg = [event_type txt1 event_time];
disp(msg)
disp(txt2)
Specifying the Value of Callback Function Properties
You associate a callback function with a specific event by setting the value of
the appropriate callback property. You can specify the callback function as
a text string, cell array, or function handle. To access the object and event
arguments, you must specify the function as a cell array or as a function
handle. If your callback function accepts additional arguments, you must
use a cell array.
The following table shows the syntax for several sample callback functions
and describes how you call them.
Callback Function Syntax
function myfile
function myfile(obj, event)
function myfile(obj, event,
arg1, arg2)
function myfile(obj, event,
arg1, arg2)
How to Specify as a Property
Value
set(h, 'StartFcn', 'myfile')
set(h, 'StartFcn', @myfile)
set(h, 'StartFcn', {'myfile',
5, 6})
set(h, 'StartFcn', {@myfile,
5, 6})
This example illustrates several ways you can specify the value of timer object
callback function properties, some with arguments and some without. To see
the code of the callback function, my_callback_fcn, see“Example:Writinga
Callback Function” on page 10-16.
1 Create a timer object.
t = timer('StartDelay', 4,'Period', 4,'TasksToExecute', 2,...
'ExecutionMode','fixedRate');
10-17