MATLAB Object-Oriented Programming

Whether this method can add objects of class double and the user-defined class depends

on how you implement the method.

When p and q are objects of different classes, MATLAB applies the rules of precedence to

determine which method to use.

“Object Precedence in Method Invocation” on page 9-47 provides information on how

MATLAB determines which method to call.

Operator Precedence

Overloaded operators retain the original MATLAB precedence for the operator. For

information on operator precedence, see “Operator Precedence”.

Sample Implementation — Addable Objects

The Adder class implements addition for objects of this class by defining a plus method.

Adder defines addition of objects as the addition of the NumericData property values.

The plus method constructs and returns an Adder object whose NumericData property

value is the result of the addition.

The Adder class also implements the less than operator (<) by defining a lt method. The

lt method returns a logical value after comparing the values in each object

NumericData property.

classdef Adder

properties

NumericData

end

methods

function obj = Adder(val)

obj.NumericData = val;

end

function r = plus(obj1,obj2)

a = double(obj1);

b = double(obj2);

r = Adder(a + b);

end

function d = double(obj)

d = obj.NumericData;

end

function tf = lt(obj1,obj2)

if obj1.NumericData < obj2.NumericData

17 Specialize Object Behavior