MATLAB Object-Oriented Programming

To fill in the preceding array elements, MATLAB calls the class constructor to create a

single object. MATLAB copies this object to all the remaining array elements. Calling the

constructor to create the default object resulted in another call to the randi function,

which returns a new random number:

A(1,1).RandNumb

ans =

10

MATLAB copies this second instance to all remaining array elements:

A(2,2).RandNumb

ans =

10

A(2,3).RandNumb

ans =

10

When initializing an object array, MATLAB assigns a copy of a single object to the empty

elements in the array. MATLAB gives each object a unique handle so that later you can

assign different property values to each object. The objects are not equivalent:

A(1,1) == A(2,2)

ans =

0

That is, the handle A(1,1) does not refer to the same object as A(2,2). The creation of

an array with a statement such as:

A(4,5) = InitHandleArray;

results in two calls to the class constructor. The first creates the object for array element

A(4,5). The second creates a default object that MATLAB copies to all remaining empty

array elements.

10 Object Arrays