HOW TO CREATE A COPY OF A HANDLES OBJECT
This script uses the class definition TestClass to create instances of TestClass and to clone its instances.
Written by Sam Oliver & Bobby Nedelkovski
The MathWorks Australia Pty Ltd
Copyright 2009, The MathWorks, Inc.
Contents
CREATE A CLONE - USING METHOD
This procedure requires you to explicitly create a placeholder in memory for cloning the original object.
% Clear any class definitions in memory clear classes % Create two instances of TestClass a = TestClass(); b = TestClass(); % Change the parameters in object 'a' a.sam = 5; a.bobby = 10; % Confirm that the parameters in object 'b' are not changed % a.sam = 5; % a.bobby = 10; % b.sam = 1; % b.bobby = 2; a b % Call the copy object method to create a clone of 'a' using 'b' copyobj(a,b); % a.copyobj(b); % Can use this syntax instead % Check the parameter values for 'a' and 'b' are the same % a.sam = 5; % a.bobby = 10; % b.sam = 5; % b.bobby = 10; a b % Change the parameters in object 'a' again a.sam = 500; a.bobby = 1000; % Confirm the clone (or deep copy) is successfull by comparing 'a' and 'b' % a.sam = 500; % a.bobby = 1000; % b.sam = 5; % b.bobby = 10; a b
Warning: Objects of 'onCleanup' class exist. Cannot clear this class or any of its super-classes.
a =
TestClass handle
Properties:
sam: 5
bobby: 10
b =
TestClass handle
Properties:
sam: 1
bobby: 2
a =
TestClass handle
Properties:
sam: 5
bobby: 10
b =
TestClass handle
Properties:
sam: 5
bobby: 10
a =
TestClass handle
Properties:
sam: 500
bobby: 1000
b =
TestClass handle
Properties:
sam: 5
bobby: 10
ANOTHER WAY TO CLONE - USING CONSTRUCTOR
This procedure implicitly creates a placeholder in memory for cloning the original object by way of the constructor.
clear classes % Create an object of TestClass a = TestClass(); % Change the parameters in object 'a' a.sam = 5; a.bobby = 10; % Create a clone (or deep copy) of object 'a' b = TestClass(a); % Check the parameter values for 'a' and 'b' are the same % a.sam = 5; % a.bobby = 10; % b.sam = 5; % b.bobby = 10; a b % Change the parameters in object 'a' again a.sam = 500; a.bobby = 1000; % Confirm the clone (or deep copy) is successfull by comparing 'a' and 'b' % a.sam = 500; % a.bobby = 1000; % b.sam = 5; % b.bobby = 10; a b
Warning: Objects of 'onCleanup' class exist. Cannot clear this class or any of its super-classes.
a =
TestClass handle
Properties:
sam: 5
bobby: 10
b =
TestClass handle
Properties:
sam: 5
bobby: 10
a =
TestClass handle
Properties:
sam: 500
bobby: 1000
b =
TestClass handle
Properties:
sam: 5
bobby: 10