This is machine translation

Translated by Microsoft
Mouseover text to see original. Click the button below to return to the English verison of the page.

Note: This page has been translated by MathWorks. Please click here
To view all translated materals including this page, select Japan from the country navigator on the bottom of this page.

Subclass Syntax

Subclass Definition Syntax

To define a class that is a subclass of another class, add the superclass to the classdef line after a < character:

classdef ClassName < SuperClass

When inheriting from multiple classes, use the & character to indicate the combination of the superclasses:

classdef ClassName < SuperClass1 & SuperClass2

See Class Member Compatibility for more information on deriving from multiple superclasses.

Class Attributes

Subclasses do not inherit superclass attributes.

Subclass double

Suppose you want to define a class that derived from double and restricts values to be positive numbers. The PositiveDouble class:

classdef PositiveDouble < double
      function obj = PositiveDouble(data)
         if nargin == 0
            data = 1;
         obj = obj@double(data);

Create an object of the PositiveDouble class using a 1-by-5 array of numbers:

a = PositiveDouble(1:5);

You can perform operations on objects of this class like any double.

ans =


Objects of the PositiveDouble class must be positive values.

a = PositiveDouble(0:5);
Error using mustBePositive (line 19)
Value must be positive.

Error in PositiveDouble (line 7)

Related Topics

Was this topic helpful?