Find element in heterogeneous object array

Hi,

I have a ParentClass subclassing matlab.mixin.Heterogeneous and two SubClasse1 and SubClasse2 subclassing my ParentClass.

I build a heterogeneous array of SubClasse1 and SubClasse2 objects.

How can I find in the array, elements equal to a given object being either SubClasse1 or SubClasse2.

child1 = SubClasse1;
child2 = SubClasse2;

child1 == [child1 child2]

I obtain the following error because of the heterogeneous array :

Unable to call method 'eq' because one or more inputs of class 'ParentClass' are heterogeneous and 'eq' is not sealed.  For more details please see the method dispatching rules for heterogeneous arrays.

I tried to look at the method dispatching rules but how to do that for 'eq' ?

Thanks in advance for your help.

[Andreas Justin]

I've solved this implementing the following code in the ParentClass

methods(Sealed, Access=public)
    function tf = ne(varargin)
        tf = ne@handle(varargin{:});
    end
    function tf = eq(varargin)
        tf = eq@handle(varargin{:});
    end
end

Answer 1

[Steven Lord]

Something like this should work.

child1 = SubClasse1;
child2 = SubClasse2;
vectorOfObjects = [child1 child2]
isClass1 = arrayfun(@(x) isa(x, 'SubClasse1'), vectorOfObjects)
allTheSubClasse1Objects = vectorOfObjects(isClass1)
allTheSubClasse2Objects = vectorOfObjects(~isClass1)

[Jérémy]

Hi, thanks for your answer.

I used arrayfun too but like this:

arrayfun(@(x) child1 == x, vectorOfObjects)

Because I'm looking for a given object in the heterogeneous array and not just if it's of a matching class. But anyway it's working.

I was just wondering if there is a way to do it without arrayfun.

[Steven Lord]

I'd try using ismember.