Package

/test.m, test function
/test2.m, test function
/+Package/@Car/Car.m, class
/+Package/@Car/disp.m, method of class in a different file
/+Package/@Car/disp2.m, method of class in a different file
/+Package/Num.m, class
/+Package/disp.m, function

+Package, package folder, is a namespace within which names must be unique
@Car, class folder, within which only one class is defined, the methods can be saved in the different file in the class folder

classdef Car
    properties (Access = private)
        producer
    end
    properties (Access = protected)
        year = 0
    end
    properties (Access = public)
        model
    end
    methods
        % Constructor
        function self = Car(p, m)
            self.producer = p;
            self.model = m;
        end
        
        % Accessor
        function p = getProducer(self)
            p = self.producer;
        end
        function y = getYear(self)
            y = self.year;
        end
        function m = getModel(self)
            m = self.model;
        end
        disp(self)
        disp2(self)
        
        % Mutator
        function self = setProducer(self, p)
            self.producer = p;
        end
        function self = setYear(self, y)
            self.year = y;
        end
        function self = setModel(self, m)
            self.model = m;
        end
    end
end

function disp(self)
    fprintf('Producer: %s\nModel: %s\nYear: %d\n', self.producer, self.model, self.year);
end

function disp2(self)
    fprintf('------------------------\n');
    disp(self);
    fprintf('------------------------\n');
end

Methods of Class in Separate Files
Declare the function signature in the classdef file in a method block
Each function should be defined in a separated file

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 disp(c)
    c.disp();
end

function test()
    % Create a Car Object
    c = Package.Car('Honda', 'Accord');
    c.disp();
    c.disp2();
    
    % Create a Num Object
    n = Package.Num(80);
    n.disp();
    
    % Call Functions in Package
    Package.disp(c);
end

function test2()
    import Package.*
    % Create a Car Object
    c = Car('Honda', 'Accord');
    c.disp();
    c.disp2();
    
    % Create a Num Object
    n = Num(80);
    n.disp();
    
    % Call Functions in Package
    disp(c);
end