MATLAB Object-Oriented Programming

Numeric values (floating-point and integer values):

isa(a,'numeric')

ans =

1

isa Returns True for Subclasses

isa returns true for classes derived from the specified class. For example, the SubInt

class derives from the built-in type int16:

classdef SubInt < int16

methods

function obj = SubInt(data)

if nargin == 0

data = 0;

end

obj = obj@int16(data);

end

end

end

By definition, an instance of the SubInt class is also an instance of the int16 class:

aInt = SubInt;

isa(aInt,'int16')

ans =

1

Using the integer category also returns true:

isa(aInt,'integer')

ans =

1

Test for Specific Types

The class function returns the name of the most derived class of an object:

class(aInt)

12 How to Build on Other Classes