MATLAB Object-Oriented Programming

Concatenation Methods

In this section...

“Default Concatenation” on page 17-11

“Methods to Overload” on page 17-11

Default Concatenation

You can concatenate objects into arrays. For example, suppose that you have three

instances of the class MyClass, obj1, obj2, obj3. You can form arrays of these objects

using brackets. Horizontal concatenation calls horzcat:

HorArray = [obj1,obj2,obj3];

HorArray is a 1-by-3 array of class MyClass. You can concatenate the objects along the

vertical dimension, which calls vertcat:

VertArray = [obj1;obj2;obj3]

VertArray is a 3-by-1 array of class MyClass. To concatenate arrays along different

dimensions, use the cat function. For example:

ndArray = cat(3,HorArray,HorArray);

ndArray is a 1-by-3-by-2 array.

Methods to Overload

Overload horzcat, vertcat, and cat to produce specialized behaviors in your class.

Overload both horzcat and vertcat whenever you want to modify object concatenation

because MATLAB uses both functions for any concatenation operation.

See Also

Related Examples

• “Subclasses of Built-In Types with Properties” on page 12-68

Concatenation Methods