MATLAB Object-Oriented Programming

dims = [varargin{2:end}];

r = zeros(dims,'Color');

for k = 1:prod(dims)

r(k) = Color('RGB',randi(varargin{1},[1,3]));

end

end

end

end

end

Prototype Object Method Implementation

The objective of a method that returns an array of objects that are “like a prototype

object” depends on the requirements of the class. For the Color class, the zeroLike

method creates objects that have the ColorSpace property value of the prototype object,

but the ColorValues are all zero.

Here is an implementation of a zerosLike method for the Color class. This

implementation:

• Defines the zerosLike method as Hidden


• Returns a scalar Color object if the call to the zeros function has no dimension
  arguments


• Returns an empty array if the call to the zeros function has any dimension arguments
  that are negative or equal to 0.


• Returns an array of Color objects of the dimensions specified by the call to the zeros
  function.

classdef Color

...

methods (Hidden)

function z = zerosLike(obj,varargin)

if nargin == 1

% For zeros('like',obj)

cSpace = obj.ColorSpace;

z = Color;

z.ColorSpace = cSpace;

elseif any([varargin{:}] <= 0)

% For zeros with any dimension <= 0

z = Color.empty(varargin{:});

else

% For zeros(m,n,...,'like',obj)

if ~isscalar(obj)

error('Prototype object must be scalar')

end

obj = Color(obj.ColorSpace,zeros(1,3,'like',obj.ColorValues));

9 Methods — Defining Class Operations