MATLAB Object-Oriented Programming

numel(d)

ans =

10

dsub = d(7:end);

size(dsub)

ans =

1 4

The double class defines these behaviors, including parentheses indexing.

Subclasses Inherit Behavior

Unless the subclass explicitly overrides superclass behavior, subclasses behave like their

superclasses. For example, SimpleDouble subclasses double and defines no properties:

classdef SimpleDouble < double

methods

function obj = SimpleDouble(data)

if nargin == 0

data = 0;

end

obj = obj@double(data);

end

end

end

Create an object and assign the values 1:10:

sd = SimpleDouble(1:10);

The size function returns the size of the superclass part:

size(sd)

ans =

1 10

The numel function returns the number of elements in the superclass part:

12 How to Build on Other Classes