MATLAB Object-Oriented Programming

a =

ImData with properties:

Data: 0

Property assignment invokes the validators in left-to-right order. Assigning a char vector

to the Data property causes an error thrown by mustBeNumeric.

a.Data = 'red'

Error setting property 'Data' of class 'ImData':

Value must be numeric.

Assigning a numeric value that is out of range causes an error thrown by

mustBeInRange.

a.Data = -1

Error setting property 'Data' of class 'ImData':

Value assigned to Data property is not in range 0...255

Add Support for Validation Functions

Support MATLAB validation functions for objects of your class by implementing the

dependent functions as methods of your class. To determine which methods to implement

for each function, see the validation function reference pages listed in this table

“MATLAB Validation Functions” on page 8-43.

For example, suppose that you want your class to support the mustBeGreaterThan

validation function. Overload these MATLAB functions as methods in your class:

• isreal — Always return logical true because mustBeGreaterThan does not
  support complex numbers.


• gt — The second object in the comparison must be scalar, as required by
  mustBeGreaterThan.

The SupportmBGT class implements support for mustBeGreaterThan.

classdef SupportmBGT

properties

Prop(1,1) double {mustBeReal}

end

8 Properties — Storing Class Data