• Derive class from handle to make mutators work, to make class more like class in Python
• Representative Class Code

classdef Num < handle
    properties
        value
    end
    methods
        % Constructor
        function self = Num(n)
            self.value = n;
        end
        
        % Accessor
        function disp(self)
            fprintf('Num: %d\n', self.value);
        end
        
        % Mutator
        function add(self, v)
            self.value = self.value + v;
        end
        function multiply(self, v)
            self.value = self.value*v;
        end
    end
end
			

function numTest()
    % Create a Num Object
    n = Num(1);
    
    % Access Properties
    n.value %1
    n.value = 10; %10
    n.disp(); %Num: 10
    
    % Access Mutators
    n.add(10); %20
    n.disp(); %Num: 20
    n.multiply(10); %200
    n.disp; %Num: 200

    % Access object
    disp(n); %Num: 200
    add(n, 10);
    disp(n); %Num: 210
    multiply(n, 10);
    disp(n); %Num: 2100
    
end
		

• Each class has only one constructor, extra constructors cause errors
• Class in MATLAB is more like struct in C/C++, use obj.property to access properties directly, not need get and set functions

classdef Num
    properties
        value
    end
    methods
        % Constructor
        function self = Num(n)
            self.value = n;
        end
        
        % Accessor
        function disp(self)
            fprintf('Num: %d\n', self.value);
        end
        
        % Mutator
        function self = add(self, v)
            self.value = self.value + v;
        end
        function self = multiply(self, v)
            self.value = self.value*v;
        end
    end
end
		

function numTest()
    % Create a Num Object
    n = Num(10);

    % Access Mutators
    n = n.add(10); %20
    n.disp(); %Num: 20
    
    n = n.multiply(10); %200
    n.disp; %Num: 200

    n = add(n, 10);
    n.disp(); %Num: 210
    
    n = multiply(n, 10);
    n.disp(); %Num: 2100
    
end
	

classdef Num < handle
    properties
        value
    end
    methods
        % Constructor
        function self = Num(n)
            self.value = n;
        end
        
        % Accessor
        function disp(self)
            fprintf('Num: %d\n', self.value);
        end
        
        function delete(self)
            fprintf('Destructor is called ...\n');
        end
    end
end
	

• Delete is only defined as class destructor for handle classes
• Handle Class Destructor