Specify label to associate with instrument object
You configure Tag to be a string value that uniquely identifies an instrument object.
Tag is particularly useful when constructing programs that would otherwise need to define the instrument object as a global variable, or pass the object as an argument between callback routines.
You can return the instrument object with the instrfind function by specifying the Tag property value.
Suppose you create a serial port object on a Windows® machine associated with the serial port COM1.
s = serial('COM1'); fopen(s);
You can assign s a unique label using Tag.
You can access s in the MATLAB® workspace or in a file using the instrfind function and the Tag property value.
s1 = instrfind('Tag','MySerialObj');