Private method access instance variable in MATLAB

In MATLAB, instance variables can be accessed within private methods using the obj keyword - an implicit reference to the current object instance.

Here is an example of a class with a private method that accesses the instance variable:

classdef MyClass
   properties (Access = private)
      myVar = 10;
   end
   
   methods (Access = private)
      function myPrivateMethod(obj)
         disp(['The value of myVar is: ' num2str(obj.myVar)]);
      end
   end
end

In this example, we have defined a private method myPrivateMethod that uses the obj keyword to access the private instance variable myVar and display its value.

To use this private method, we can create an instance of the MyClass object and call the method using the dot notation:

mc = MyClass();
mc.myPrivateMethod();

This will output the following:

The value of myVar is: 10

Note that private methods can only be accessed by other methods within the same class definition, and cannot be called directly outside the class.