MATLAB Object-Oriented Programming

Find Objects with Specific Values

In this section...

“Find Handle Objects” on page 16-10

“Find by Attribute Settings” on page 16-11

Find Handle Objects

Use the handle class findobj method to find objects that have properties with specific

values. For example, the following class defines a PhoneBook object to represent a

telephone book entry in a data base. The PhoneBook class subclasses the dynamicprops

class, which derives from handle.

classdef PhoneBook < dynamicprops

properties

Name

Address

Number

end

methods

function obj = PhoneBook(n,a,p)

obj.Name = n;

obj.Address = a;

obj.Number = p;

end

end

end

Here are three of the PhoneBook entries in the database:

PB(1) = PhoneBook('Nancy Vidal','123 Washington Street','5081234567');

PB(2) = PhoneBook('Nancy Vidal','123 Main Street','5081234568');

PB(3) = PhoneBook('Nancy Wong','123 South Street','5081234569');

One of these three PhoneBook objects has a dynamic property:

PB(2).addprop('HighSpeedInternet');

PB(2).HighSpeedInternet = '1M';

Find Property/Value Pairs

Find the object representing employee Nancy Wong and display the name and number by

concatenating the strings:

16 Information from Class Metadata