How to display aggregation and composition in Class Diagram Viewer?

I note that there are no aggregation or composition in the legend. Is it beause Class Diagram Viewer doesn't support them?

If it support them, how do I make sure these relationships are working?

https://www.mathworks.com/help/matlab/ref/classdiagramviewer.html

[Jon]

I have the same question. It seems that you have not gotten any responses though. So specifically if a class A has as a property an instance of a class B, then how do you diagram that A "has a" B?

[Mahmoud Elzouka]

That is exactly what I need.

Answer 1

[Aneela]

Hi, Mahmoud Elzouka

The “Class Diagram Viewer” shows inheritance relationships very effectively.

Currently the association relationships like aggregation and composition are not supported by the “Class Diagram Viewer” app.

For more details regarding the class diagrams and creating them in “Class Diagram Viewer” app, refer to the following link.

https://www.mathworks.com/help/matlab/ref/matlab.diagram.classviewer-class.html

Answer 2

[Jan Kappen]

It does!

You just need to tell MATLAB which type of object you're expecting.

Assuming:

myClass.m

classdef myClass
    properties 
        composition compositionClass % type hint here!
    end
    methods
        function obj = myClass(compObj)
            obj.composition = compObj;
        end
    end    
end

compositionClass.m

classdef compositionClass
    properties 
        prop (1,1) double = 1
    end   
end

This is properly one of the best features added to MATLAB in the last years. See details here: Function Argument Validation - MATLAB & Simulink (mathworks.com)

Be sure to check the box "associations".