Can I nest objects in MATLAB?

Is it possible to nest objects in MATLAB? For example, say that I have a 'car' class and ultimately a 'car' object. The car has properties like name and color. However, I want an 'wheel' property with a class and properties of it's own to belong to the 'car'. There are four wheels on my car and the wheels can be different sizes (front to back).

With the code below, I am able to create a nested object scenario. I can retrieve the properties of the lone wheel (Car.Wheel.Width). My problem is that I don't know how to create an array of multiple wheel objects that belong to the car (Car.Wheel(2).Width...Car.Wheel(3).Width...etc)

Is this possible?

classdef carClass

     properties(Access = public)
        Name
        Color
     end

     properties(SetAccess = private)
        Wheel
     end

     methods

          function obj = carClass
             obj.Wheel = wheelClass;
          end

     end
  end

and

classdef wheelClass < handle

      properties
          Number
          Location
          Width
      end
  end

Answer 1

[per isakson]

Yes! See Initialize Arrays of Handle Objects and search the documentation.

&nbsp

In response to comment

I don't understand what problem you encounter, but here are two variants

car_1 = carClass_1;
car_1 = car_1.setWheelLocation;
car_1.dispWheelLocation
car_2 = carClass_2;
car_2 = car_2.setWheelLocation;
car_2.dispWheelLocation

which both outputs

rf
lf
lr
rr

where

classdef carClass_1
    properties(Access = public)
        Name
        Color
    end
    properties(SetAccess = private)
        Wheel = wheelClass.empty;
    end
    methods
        function obj = carClass_1
            obj.Wheel(1,4) = wheelClass;
        end
        function obj = setWheelLocation( obj )
            obj.Wheel(1,1).Location = 'rf';
            obj.Wheel(1,2).Location = 'lf';
            obj.Wheel(1,3).Location = 'lr';
            obj.Wheel(1,4).Location = 'rr';
        end
        function dispWheelLocation( obj )
            obj.Wheel(1,:).Location
        end
    end
end

and

classdef carClass_2
    properties(Access = public)
        Name
        Color
    end
    properties(SetAccess = private)
        Wheel
    end
    methods
        function obj = carClass_2
            obj.Wheel = wheelClass;
            obj.Wheel(1,end+1) = wheelClass;
            obj.Wheel(1,end+1) = wheelClass;
            obj.Wheel(1,end+1) = wheelClass;
        end
        function obj = setWheelLocation( obj )
            obj.Wheel(1,1).Location = 'rf';
            obj.Wheel(1,2).Location = 'lf';
            obj.Wheel(1,3).Location = 'lr';
            obj.Wheel(1,4).Location = 'rr';
        end
        function dispWheelLocation( obj )
            obj.Wheel(1,:).Location
        end
    end
end

&nbsp

I don't fully understand why you chose to make wheelClass a handle class and carClass a value class, but that's a different question.

[jmsrz]

Thank you for the prompt response. I am familiar with the subject that you shared. As such, I am able to initialize objects arrays independently as the documentation conveys; however, my question is how do I do this when the object is declared through the parent class.