Constructor in MATLAB

A constructor in MATLAB is a special method that is used to create objects of a particular class. When an object is created, the constructor performs certain initialization tasks, such as setting default property values, allocating memory, or initializing variables.

To use a constructor in MATLAB, you need to define a class with a constructor method that is called automatically when an object is created. Here is an example of how to define a class with a constructor:

classdef MyClass
   properties
      x
   end
   methods
      function obj = MyClass(val)
         if nargin == 1
            obj.x = val;
         end
      end
   end
end

In this example, the MyClass class has a single property x, and a constructor method that receives an argument val. If the constructor is called with a single argument, it assigns the value to the x property of the new object.

To create a new object of the MyClass class, you can simply call the constructor:

>> A = MyClass(10)
A = 
  MyClass with properties:
    x: 10

This will create a new object A of the MyClass class, with the x property initialized to the value 10.

You can customize the constructor method to perform any initialization tasks you need, such as allocating memory, initializing other properties, or checking input arguments. For example, here is a modified version of the MyClass constructor that initiates both x and y properties:

classdef MyClass
   properties
      x
      y
   end
   methods
      function obj = MyClass(val1,val2)
         if nargin == 2
            obj.x = val1;
            obj.y = val2;
         end
      end
   end
end

You can create a new object of the MyClass class with two arguments:

>> B = MyClass(3,5)
B = 
  MyClass with properties:
    x: 3
    y: 5

This will create a new object B of the MyClass class, with the x and y properties initialized to the values 3 and 5, respectively.