Data you want to associate with a serial port object
UserData to store data that
you want to associate with a serial port object. The object does not
use this data directly, but you can access it using the
get function or the dot notation.
The default value is an empty vector.
Suppose you create the serial port object associated with the serial port COM1.
s = serial('COM1');
You can associate data with
s by storing
coeff.a = 1.0; coeff.b = -1.25; s.UserData = coeff;