MATLAB: Setter method does not work on inherited class

Question

How can I make setter function works on a child class?

classdef Foo < matlab.mixin.Heterogeneous
  properties
      foo = 5;
  end
  methods
      function setFoo(obj, foo) 
          obj.foo = foo;
      end
  end
end
classdef BabyFoo < Foo 
  methods
      function obj = BabyFoo()
          obj = obj@Foo();
      end
  end
end
>> test = BabyFoo();
>> test.foo;     % 5
>> test.setFoo(10);
>> test.foo;     % 5  (Why it's not 10 ?!)

Answer 1

You're using handle syntax to set the property of your class, yet your class is a value class. Either change your setFoo to:

function obj = setFoo(obj, foo)
   obj.foo = foo;
end

and call it with:

test = test.setFoo(10);

or derive from handle:

classdef Foo < matlab.mixin.Heterogeneous & handle

Also, you can create setter and getter for the class properties, using this syntax

function set.foo(obj, value) %for handle class
   obj.foo = value;
end
function obj = set.foo(obj, value) % for value class
   obj.foo = value;
end

which you call simply with:

obj.foo = 10; %for value and handle class.