MATLAB Object-Oriented Programming

• Object initialization — Call superclass constructors.


• Post initialization — Perform any operations related to the subclass, including
  referencing and assigning to the object, call class methods, passing the object to
  functions, and so on.

This code illustrates the basic operations performed in each section:

classdef ConstructorDesign < BaseClass1

properties

ComputedValue

end

methods

function obj = ConstructorDesign(a,b,c)

%% Pre Initialization %%

% Any code not using output argument (obj)

if nargin == 0

% Provide values for superclass constructor

% and initialize other inputs

a = someDefaultValue;

args{1} = someDefaultValue;

args{2} = someDefaultValue;

else

% When nargin ~= 0, assign to cell array,

% which is passed to supclass constructor

args{1} = b;

args{2} = c;

end

compvalue = myClass.staticMethod(a);

%% Object Initialization %%

% Call superclass constructor before accessing object

% You cannot conditionalize this statement

obj = obj@BaseClass1(args{:});

%% Post Initialization %%

% Any code, including access to object

obj.classMethod(arg);

obj.ComputedValue = compvalue;

...

end

...

end

9 Methods — Defining Class Operations