How do I use a class property validation function with a dynamic argument?

In Matlab OOP, I wanna use a function like mustBeEqualSize(a,b) from the Examples on function property validation to validate a property:

classdef foo
    properties
        a
        b {mustBeEqualSize(a,b)}
    end
end

However, this gives me an error.

Answer 1

[Jan Siegmund]

The problem is, that MATLAB classes only support constant arguments on property validation.

However function arguments can be validated perfectly fine with dynamic arguments.

So a workaround is to validate the arguments of the constructor:

classdef Foo
    properties
        a
        b
    end
    
    methods
        
        function obj = Foo(a,b)
            arguments
                a
                b {mustBeEqualSize(a,b)}
            end
            obj.a = a;
            obj.b = b;
        end

    end
end