MATLAB Object-Oriented Programming

Construct Object Arrays

In this section...

“Build Arrays in the Constructor” on page 10-2

“Referencing Property Values in Object Arrays” on page 10-3

Build Arrays in the Constructor

A class constructor can create an array by building the array and returning it as the

output argument.

For example, the ObjectArray class creates an object array that is the same size as the

input array. Then it initializes the Value property of each object to the corresponding

input array value.

classdef ObjectArray

properties

Value

end

methods

function obj = ObjectArray(F)

if nargin ~= 0

m = size(F,1);

n = size(F,2);

obj(m,n) = obj;

for i = 1:m

for j = 1:n

obj(i,j).Value = F(i,j);

end

end

end

end

end

end

To preallocate the object array, assign the last element of the array first. MATLAB fills the

first to penultimate array elements with the ObjectArray object.

After preallocating the array, assign each object Value property to the corresponding

value in the input array F. To use the class:

10 Object Arrays