How to pass field values to subclass from superclass?

Hi guys,

I would like to pass my propert values of super class to subclass? I could transfer the properties but not the values of it. I am sending you the code that i made. Please tell me how could i correct it.

classdef clWinding
    properties
        Npcs
        Npcp
    end
    properties (Dependent)
        kb
    end
    methods
        function objW = clWinding (Npcs, Npcp)
            objW.Npcs = Npcs;
            objW.Npcp = Npcp;
        end
        function kb = get.kb (objW)
            kb = objW.Npcs + objW.Npcp;
        end
    end
end

This is the superclass

classdef clLitz <clWinding
    properties
        Litz
    end
    methods
        function objLitz = clLitz (Npcs, Npcp, Litz)
            objLitz @ clWindingPrimary (Npcs, Npcp);
            objLitz.Litz = Litz;
        end
    end
end    

When i did this i could pass the fields but not values of it. Can anyone tell me what mistake i have done and help me to resolve it.

Thnak you

[Steven Lord]

As you've written it clWinding is your superclass and clLitz the subclass. The subclass inherits from the superclass.

Can you show the exact code you run to try to create (instantiate) a clLitz object and show the full and exact text of any error messages you received when you executed that code?

[kanuri venkata mohana]

Hi Steven,

Thankyou for your quick reply. It is a small part of my code. I cannot run a single class. So i think i cannot send the errors. When i created an object "objLitz" for clLitz, i got all the parameters which i defined in clWindingPrimary but i didnot get the values of them. how to do that was my question?

[Steven Lord]

Because your objLitz isa clWinding object (through inheritance) you can ask for the values of the (for example) Npcs property it has because it is a clWinding object.

obj = clLitz(1, 2, 3) % using dummy values
N = obj.Npcs

[kanuri venkata mohana]

Once again Thankyou for your reply. So, you mean i need to assign values manually for the superclass properties in my subclass right.

Answer 1

[per isakson]

There are syntax errors in your code. Try to keep the little box in the upper right corner, , green at all time.

I've fixed your code, based on a bit of guessing, and run

>> objLitz = clLitz( -17, 17, 991 );
>> objLitz
objLitz = 
  clLitz with properties:

    Litz: 991
    Npcs: -17
    Npcp: 17
      kb: 0

where

classdef clWinding
    properties
        Npcs
        Npcp
    end
    properties (Dependent)
        kb
    end
    methods
        function objW = clWinding( Npcs, Npcp )
            objW.Npcs = Npcs;
            objW.Npcp = Npcp;
        end
        function kb = get.kb( objW )
            kb = objW.Npcs + objW.Npcp;
        end
    end
end

and

classdef clLitz < clWinding
    properties
        Litz
    end
    methods
        function objLitz = clLitz (Npcs, Npcp, Litz)
            % How to Call Superclass Constructor
            objLitz = objLitz@clWinding( Npcs, Npcp);
            objLitz.Litz = Litz;
        end
    end
end

Answer 2

[Matt J]

Your terminolgy is confusing, so I'm not completely sure I understand your question. "Classes" do not have property values. Only "objects" of classes have property values. If you have an object obj_super and you want to copy all of its non-Dependent property values to a different object obj_sub, then you can use the attached file,

obj_sub=copyprops(obj_super,obj_sub)