MATLAB Object-Oriented Programming

C = A(3,4);

MATLAB calls the built-in subsref function to determine how to interpret the statement.

Similarly, if you execute a statement that involves indexed assignment:

C(4) = 7;

MATLAB calls the built-in subsasgn function to determine how to interpret the

statement.

The MATLAB default subsref and subsasgn functions also work with user-defined

objects. For example, create an array of objects of the same class:

for k=1:3

objArray(k) = MyClass;

end

Referencing the second element in the object array, objArray, returns the object

constructed when k = 2:

D = objArray(2);

class(D)

ans =

MyClass

You can assign an object to an array of objects of the same class, or an uninitialized

variable:

newArray(3,4) = D;

Arrays of objects behave much like numeric arrays in MATLAB. You do not need to

implement any special methods to provide standard array behavior with your class.

For general information about array indexing, see “Array Indexing”.

What You Can Modify

You can modify your class indexed reference and/or assignment behavior by implementing

class methods called subsref and subsasgn. For syntax description, see their respective

reference pages.

17 Specialize Object Behavior